Loop frame wiring harnesses

Main harness for V700 CIVILIAN models equipped with a Magneti Marelli charging system.

• The V700 lacks a starter button, using the ignition switch instead.
• The V700 uses a Magneti Marelli charging system. If you've changed to a Bosch charging system, I can build to suit (no extra charge).
• While the V700 originally came without a starter relay, this harness is built to use a starter relay. Should you wish not to use a starter relay, I can build to suit (no extra charge).
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Main harness for V700 CIVILIAN models equipped with an aftermarket alternator.

• Required wires for the alternator are neatly integrated into the wiring harness.
• Features the correct connector to plug into the alternator (works with Field-Nolan and Kevin Hahn/Scrambler Cycle alternator kits).
• Unused wires to the generator and voltage regulator are eliminated.
• The V700 lacks a starter button, using the ignition switch instead.
• While the V700 originally came without a starter relay, this harness is build to use a starter relay. Should you wish not to use a starter relay, I can build to suit (no extra charge).
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Main harness for Ambassador and Eldorado CIVILIAN models equipped with a Magneti Marelli charging system.

• Specifically built with terminals to support the Magneti Marelli generator and voltage regulator.
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Main harness for Ambassador and Eldorado CIVILIAN models equipped with a Bosch charging system.

• Specifically built with terminals to support the Bosch generator and voltage regulator.
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Main harness for Ambassador and Eldorado CIVILIAN models equipped with an aftermarket alternator.

• Required wires for the alternator are neatly integrated into the wiring harness.
• Features the correct connector to plug into the alternator (works with Field-Nolan and Kevin Hahn/Scrambler Cycle alternator kits).
• Unused wires to the generator and voltage regulator are eliminated.
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Main harness for Ambassador and Eldorado POLICE models equipped with a Magneti Marelli charging system.

• Specifically built with terminals to support the Magneti Marelli generator and voltage regulator.
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Main harness for Ambassador and Eldorado POLICE models equipped with a Bosch charging system.

• Specifically built with terminals to support the Bosch generator and voltage regulator.
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Main harness for Ambassador and Eldorado POLICE models equipped with an aftermarket alternator.

• Required wires for the alternator are neatly integrated into the wiring harness.
• Features the correct connector to plug into the alternator (works with Field-Nolan and Kevin Hahn/Scrambler Cycle alternator kits).
• Unused wires to the generator and voltage regulator are eliminated.
• Works with civilian or police handlebars.
• Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.

Installation instructions

Left handlebar switch

Ready for your switch (MG# 12746020 or MG# 12746001). Works with switch pictured below (not included).

When ordering: Please specify civilian or police handlebars.

IMPORTANT NOTE #1: As with all switches actuating higher amperage components, I consider relays for the headlight low and high beam circuits a necessity. I sell a very nice relay kit specifically made for this very purpose.

IMPORTANT NOTE #2: It is very easy to destroy original or aftermarket switches when using a conventional soldering iron. Even if you know exactly what you are doing and are very experienced with soldering procedures, the switches can very easily be rendered useless. Rather than using solder, I strongly recommend the following:

• Use a conductive epoxy to secure the wires to the switch. Most epoxies, including JB Weld, do not conduct electricity. MG Chemicals makes a conductive epoxy that I've used with excellent results (part number 8331D). Atom Adehesives AA-PROD 123 is a less expensive epoxy that Charlie Mullendore of Antietam Classic Cycle reports works well. Nick Rossi contacted Atom Adhesives directly and found that AA-Duct 902 is the most conductive epoxy and that AA-Duct 916 is more suitable for motorcycle applications as it is flexible once cured and will be more resistant to vibration. Nick prefers the AA-Duct 916 (available from Amazon).

Installation instructions

Negative terminal on the coil to the distributor - for Magneti Marelli coils

Magneti Marelli coils accept 5 mm ring terminals; this sub-harness comes with the correct ring terminal.

This harness also works with the Pertronix Flamethrower model 40611.

Installation instructions

Negative terminal on the coil to the distributor - for Bosch coils

Bosch coils accept female spade terminals; this sub-harness comes with the correct female spade terminal.

This harness works with the Bosch Blue coil that is commonly used as a replacement.

Installation instructions

Rear brake light switch to brake light

Replaces MG# 12747500.

Installation instructions

Ground wire for voltage regulators (same for Magneti Marelli and Bosch voltage regulators)

Installation instructions

Battery ground

Originally, the terminal at the battery was a post style terminal. Since that style of terminal is very rare today with motorcycle batteries, I've chosen to fit a lug to accept a 6 mm bolt. Ground cable is 6 AWG and is 450 mm (~17 ³⁄₄ inch) in total length. If you require something different, please let me know.

Installation instructions

Headlight plug

Nice quality replacement headlight plug constructed using the correct wires and terminals. In contrast to the original, the back of the plug employs a cover to prevent accidental shorts. Plug securely locks into place and requires that tabs on either side be depressed in order to remove the plug.

Installation instructions

City light

Wiring to connect the city light as fit to some European models. Several terminals provided to fit a variety of light bulb sockets.

Installation instructions

Tail light harness applicable to several tail lights: MG# 10740900 MG# 12740900 MG# 12740920 MG# 14474900

A simple harness to replace the aging wires at your tail light. Includes longer springs to replace the originals. Once the wires are fit to the tail light, crimp the included female bullet terminals in place.

Installation instructions

Tail light harness applicable to several tail lights: MG# 14740920 MG# 17740900

Connects the main harness to the tail light.

Wiring to connect the starter relay

Wiring and terminals are specific to each charging system and starter.

Connection to the neutral switch: I've chosen to use a 6 mm ring terminal instead of a 5 mm ring terminal on the black wire. Originally the neutral switch provided the ground for the relay, requiring the transmission to be in neutral for the motorcycle to be started. Since so many people permanently ground the relay using a 6 mm bolt on the transmission, I've decided to simply provide the 6 mm ring terminal. Should you desire the original 5 mm ring terminal, I will be happy to oblige.

Magneti Marelli note: Early Magneti Marelli starters required a separate ground wire. The modern replacement solenoid also requires a separate ground wire. Given the inconsistent need for a ground wire, I've included one with all the Magneti Marelli sub-harnesses, just to be sure you have everything you need.

Alternator note: Originally, an unfused wire was run from the voltage regulator to the relay. This harness uses a more universal 6 mm ring terminal to connect to the battery positive terminal. Length is 350 mm, which should work for just about any battery/relay installation.

When ordering please specify charging system and starter combination: Magneti Marelli, Bosch, Alternator.

Installation instructions

Ground wire for some Magneti Marelli starter solenoids

Already included with above harnesses for Magneti Marelli starters; sold here separately in case you need just this wire.

Installation instructions

Fuse box to dash

Installation instructions

Fuse box to dash

Installation instructions

Indicator light interconnect

Connects several of the lights on the dash.

Installation instructions

Ignition switch (includes wires to rear turn signals)

Correct green markers are used on the red wire, as original.

Installation instructions

Battery cable to the starter along with ancillary wires to voltage regulator and ignition switch

Wiring and terminals are specific to each charging system.

When ordering please specify Magneti Marelli or Bosch.

Note: No need to purchase this sub-harness if you have an alternator installed...I've already neatly integrated these wires into the main wiring harness.

Installation instructions

Toggle switch to 3 connection female spade connectors

Connects the toggle switch on the dash to the 3 connection female spade connectors. Supports turn signal and rear flashing (hazard) lights functionality

Installation instructions

Fuse box to left push-pull switch; includes MG# 13742540

The left push-pull switch is commonly used to to operate spot lights. Original style fuse holder included with 8 amp fuse. 8 amp is more than sufficient to operate two, 35 watt spot lights (most people fit 35 watt bulbs).

Correct green marker is used on the white/black wire, as original.

Installation instructions

Turn signals & spot lights

This harness serves a couple of important functions:

• For the turn signals, it connects the 3 connection female spade connectors to the dash indicator lights.
• For the spot lights, it connects the left push-pull switch to the 3 connection female spade connector and associated dash indicator bulb.

Installation instructions

Spot light extensions for Dietz spot lights

Moto Guzzi never made a spot light. Instead, they provided brackets and wiring to support spot lights (or other front lights), but left it up to the individual police departments to fit their own spot lights.

This harness provides color-matched wiring to connect Dietz spot lights to a 3 connection female spade connector located under the fuel tank.

The 5 mm fork terminals connect to the terminals inside each spot light. Route the wires through the spot light body and under the tank. Cut the sheathing and wiring to your desired length. Crimp the female spade terminal to the blue wire (connect to the 3 connection female spade connector). Crimp the 8 mm ring terminal to the black wire (connect to the frame ground point under the tank).

Installation instructions

Spot light extensions

Moto Guzzi never made a spot light. Instead, they provided brackets and wiring to support spot lights (or other front lights), but left it up to the individual police departments to fit their own spot lights.

This harness provides color-matched pigtail extensions to connect self-grounding spot lights of your choice to the 3 connection female spade connector for the spot lights. Comes complete with butt crimps, heat shrink, and sheathing.

Installation instructions

Handlebar switch - early left extra

Extra left hand switch used by some early Ambassador police models (later models combined this functionality with the right hand switch).

Supports the use of the red front lights. Works with switch pictured below (not included).

IMPORTANT NOTE: It is very easy to destroy original or aftermarket switches when using a conventional soldering iron. Even if you know exactly what you are doing and are very experienced with soldering procedures, the switches can very easily be rendered useless. Rather than using solder, I strongly recommend the following:

• Use a conductive epoxy to secure the wires to the switch. Most epoxies, including JB Weld, do not conduct electricity. MG Chemicals makes a conductive epoxy that I've used with excellent results (part number 8331D). Atom Adehesives AA-PROD 123 is a less expensive epoxy that Charlie Mullendore of Antietam Classic Cycle reports works well. Nick Rossi contacted Atom Adhesives directly and found that AA-Duct 902 is the most conductive epoxy and that AA-Duct 916 is more suitable for motorcycle applications as it is flexible once cured and will be more resistant to vibration. Nick prefers the AA-Duct 916 (available from Amazon).

Handlebar switch - early right

Right hand switch used by some early Ambassador police models.

NOTE: Since most people will not fit a working radio nor working front red and rear blue police lights, this is the perfect sub-harness to use for most police applications.

Supports the use of the turn signals. Works with switch pictured below (not included).

IMPORTANT NOTE: It is very easy to destroy original or aftermarket switches when using a conventional soldering iron. Even if you know exactly what you are doing and are very experienced with soldering procedures, the switches can very easily be rendered useless. Rather than using solder, I strongly recommend the following:

• Use a conductive epoxy to secure the wires to the switch. Most epoxies, including JB Weld, do not conduct electricity. MG Chemicals makes a conductive epoxy that I've used with excellent results (part number 8331D). Atom Adehesives AA-PROD 123 is a less expensive epoxy that Charlie Mullendore of Antietam Classic Cycle reports works well. Nick Rossi contacted Atom Adhesives directly and found that AA-Duct 902 is the most conductive epoxy and that AA-Duct 916 is more suitable for motorcycle applications as it is flexible once cured and will be more resistant to vibration. Nick prefers the AA-Duct 916 (available from Amazon).

Installation instructions

Handlebar switch - mid right

Right hand switch used by some mid police models.

Supports the use of the turn signals and front red lights. Includes butt crimps, heat shrink, and sheathing for connecting to the front turn signals. Works with switch pictured below (not included).

IMPORTANT NOTE: It is very easy to destroy original or aftermarket switches when using a conventional soldering iron. Even if you know exactly what you are doing and are very experienced with soldering procedures, the switches can very easily be rendered useless. Rather than using solder, I strongly recommend the following:

• Use a conductive epoxy to secure the wires to the switch. Most epoxies, including JB Weld, do not conduct electricity. MG Chemicals makes a conductive epoxy that I've used with excellent results (part number 8331D). Atom Adehesives AA-PROD 123 is a less expensive epoxy that Charlie Mullendore of Antietam Classic Cycle reports works well. Nick Rossi contacted Atom Adhesives directly and found that AA-Duct 902 is the most conductive epoxy and that AA-Duct 916 is more suitable for motorcycle applications as it is flexible once cured and will be more resistant to vibration. Nick prefers the AA-Duct 916 (available from Amazon).

Handlebar switch - late right

Right hand switch used by most later police models.

Supports the use of the turn signals, front red lights, and speaker operation. Includes butt crimps, heat shrink, and sheathing for connecting to the front turn signals. Works with switch pictured below (not included).

IMPORTANT NOTE: It is very easy to destroy original or aftermarket switches when using a conventional soldering iron. Even if you know exactly what you are doing and are very experienced with soldering procedures, the switches can very easily be rendered useless. Rather than using solder, I strongly recommend the following:

• Use a conductive epoxy to secure the wires to the switch. Most epoxies, including JB Weld, do not conduct electricity. MG Chemicals makes a conductive epoxy that I've used with excellent results (part number 8331D). Atom Adehesives AA-PROD 123 is a less expensive epoxy that Charlie Mullendore of Antietam Classic Cycle reports works well. Nick Rossi contacted Atom Adhesives directly and found that AA-Duct 902 is the most conductive epoxy and that AA-Duct 916 is more suitable for motorcycle applications as it is flexible once cured and will be more resistant to vibration. Nick prefers the AA-Duct 916 (available from Amazon).

Indicator light interconnect (early)

Three wire version used by early models equipped with dual gauge dashes. Use with MG# 13767700.

Installation instructions

Indicator light and tachometer positive terminal interconnect (late)

Four wire version used by late models equipped with dual gauge dashes. Use with MG# 13767701.

Installation instructions

Short pigtail for indicator light (neutral)

Installation instructions

Short pigtail for indicator light (oil pressure)

Installation instructions

Short pigtail for indicator light (generator)

Installation instructions

Gauge/instrument illumination interconnect

Installation instructions

Tachometer ground

Installation instructions

Distributor to tachometer (early)

Two wire version used by early models equipped with dual gauge dashes. Use with MG# 13761000.

When ordering please specify your coil: Magneti Marelli or Bosch. Magneti Marelli coils accept 5 mm ring terminals. Bosch coils (and many modern aftermarket coils) accept female spade terminals.

Installation instructions

Distributor to tachometer (late)

One wire version used by late models equipped with dual gauge dashes. Use with MG# 13761001.

Connects to the post on the distributor (post is shared with the wire from the condenser).

Installation instructions

Front brake light switch

Connects the front brake light switch to the rear brake light switch.

Originally, Moto Guzzi used lamp cord. Instead, I prefer individual wires and sheathing for a higher quality final product.

Note: Access to the rear brake light switch is very limited. I recommend using my additional sub-harness to greatly ease installation of wiring on the rear brake light switch.

Installation instructions

Right handlebar switch

Ready to solder to your switch. Works with switch pictured below (not included).

When ordering: Please specify civilian or police handlebars.

IMPORTANT NOTE: It is very easy to destroy original or aftermarket switches when using a conventional soldering iron. Even if you know exactly what you are doing and are very experienced with soldering procedures, the switches can very easily be rendered useless. Rather than using solder, I strongly recommend the following:

• Use a conductive epoxy to secure the wires to the switch. Most epoxies, including JB Weld, do not conduct electricity. MG Chemicals makes a conductive epoxy that I've used with excellent results (part number 8331D). Atom Adehesives AA-PROD 123 is a less expensive epoxy that Charlie Mullendore of Antietam Classic Cycle reports works well. Nick Rossi contacted Atom Adhesives directly and found that AA-Duct 902 is the most conductive epoxy and that AA-Duct 916 is more suitable for motorcycle applications as it is flexible once cured and will be more resistant to vibration. Nick prefers the AA-Duct 916 (available from Amazon).

Installation instructions

Turn signals

Insulated female bullet terminals are included for the rear turn signal pigtails.

The Moto Guzzi workshop manuals clearly indicate the use of a yellow/black wire for the left turn signal circuit and a yellow wire for the right turn signal circuit. However, every civilian turn signal harness I've inspected has not used this color combination. Instead, the harness for the right handlebar switch uses a yellow wire with a gray spiral tracer for the left turn signal circuit and a white wire with a gray spiral tracer for the right turn signal circuit. Furthermore, the turn signal harness uses a yellow wire with a black spiral tracer for the left turn signal circuit and a white wire with a black spiral tracer for the right turn signal circuit. I have chosen to use a yellow wire with a black spiral tracer and a white wire with a black spiral tracer throughout both the right handlebar switch harness and the turn signal harnesses.

Installation instructions

Front turn signal extensions

Originally, the front turn signals had sufficiently long pigtails which precluded the need for a separate sub-harness. If your front turn signals still have those long pigtails, you are fortunate. For the rest of us, I've included color-matched pigtail extensions, complete with butt crimps, heat shrink, and sheathing. Fits many turn signals (e.g., MG# 12750605); includes sheathing (MG# 12750705)

Installation instructions

Rear turn signal extensions

Originally, the rear turn signals had sufficiently long pigtails which precluded the need for a separate sub-harness. If your rear turn signals still have those long pigtails, you are fortunate. For the rest of us, I've included color-matched pigtail extensions, complete with butt crimps, heat shrink, and sheathing. Fits many turn signals (e.g., MG# 12750605); includes sheathing (MG# 12750805)

Installation instructions

Multifunction handlebar switch pre-wired for Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

After 10 years of building Moto Guzzi harnesses and supporting my customers, I have learned that people experience the most frustration and challenges when attempting to wire the left handlebar switch (by far). To help alleviate these issues, I am now offering this brand new switch with period appearance. The switch features a metal body and fits 22 mm (⁷⁄₈ inch) handlebars. It is pre-wired so that you can mount it on your handlebar and plug in the wires quickly and easily.

I chose this switch because of its functionality, size, and appearance. It is a good basic switch that is appropriate to the loop frames. While it does not boast all of the features and functions of a modern switch, it is much better than the original style CEV switches. I use a switch like this on my personal Ambassador and I find it easy to use and my thumb operates all of the controls with ease. As with all handlebar switches, I strongly recommend the use of relays for the headlight circuit. I have an excellent relay solution available for purchase.

• Has a true off position where both the running lights and headlight are off.
• Headlight switch has the standard low beam and high beam selector.
• Turn signal switch functions as you would expect: move the switch left to actuate the left turn signals; move the switch right to actuate the right turn signals; move the switch to the middle position to turn off turn signals.
• Simple push-button horn.
• Can be fit between the handlebar grip and the clutch perch (this is my recommended location for ease of use).

Relay solution for the starter and headlight

No more excuses! Relays greatly improve the performance of the starter and headlight. Your headlights will burn brighter and your starter solenoid will receive the high amperage current it needs when you use relays. Relays also dramatically extend the life of the starter button and headlight switch (especially the lovely and valuable original CEV switches).

I wrestled long and hard to create a solid solution that is in line with what I believe Carcano and Todero would have designed. A few points I'll mention:

• Complete solution - includes all needed components.
• Works with your existing voltage regulator: Magneti Marelli or Bosch (fitment with alternators is not a problem).
• Similar to the original starter relay (and to afford ease of access), I located all the relays behind the battery and beneath the voltage regulator. This keeps the headlight bucket largely uncluttered and doesn't hide anything under the gas tank were it is difficult to access.
• Aluminum bracket is CAD/CAM designed and precision CNC machine made for an excellent fit. All fasteners are stainless steel and metric.
• Wiring is color coded to original specifications.
• No permanent modification to the voltage regulator bracket is required. The custom brackets fit perfectly within the available space.
• Relay sockets are used to make installation trouble free.
• Includes a new headlight plug, starter relay harness, relays, flasher bracket, and turn signal flasher (a USD $43.00 value if purchased individually from me).
• Each relay is wired independently from each other: starter, headlight low beam, headlight high beam. This slight redundancy permits one relay to fail without affecting the functionality of any other relay.
• Includes 2 brackets for mounting a turn signals flasher: one each for round flashers and for rubber mounted rectangular flashers. Turn signal flasher is NOT included.
• Includes all three needed relays.
• Relays are of a standard size and easily replaced at any time (they simply plug into the socket).
• Simple installation - bolt on the bracket, route the wires, plug in to the terminals (Installation instructions here).

Installation instructions

Relay solution for dual horns

A great way to add the power of a relay when you want to operate twin horns. Gangs perfectly with the standard relay solution. Simple installation.

Relay solution for spot lights on police models

A great way to add the power of a relay for your police spot lights. Gangs perfectly with the standard relay solution. Simple installation.

Sub-harness to support the use of the K&S 12-0030 universal handlebar switch.

No more need to fiddle with butt connectors, soldering, or heat shrink. Just plug the 9-pin connector into the plug that came with your K&S switch, and the other ends into locations inside the headlight. Greatly simplifies installation.

This sub-harness combines the functionality of the original left and right handlebar switches to work with the K&S 12-0030 handlebar switch. Extra ground wire provided because the switch body does not provide the ground. Works with switch pictured below (not included). Many other universal switches would use a very similar wiring harness. I would be happy to create a custom harness for you.

When ordering: Please specify civilian or police handlebars.

The K&S 12-0030 switch is the most popular modern switch to fit because it is inexpensive, keeps all the original functionality, and does not include functions not originally used by Moto Guzzi.

NOTE: Civilian applications refer to the civilian method of wiring turn signals (directly to the flasher). Police applications refer to the police method of wiring turn signals (through the toggle switch located on the dash).

IMPORTANT NOTE: As with all switches actuating higher amperage components, I consider relays for the headlight low and high beam circuits a necessity. I sell a very nice relay kit specifically made for this very purpose.

Installation instructions

Reference the standard installation instructions and these additional notes. Connect the following wires the same as with the original left and right handlebar switches:

• Green
• Green/black
• Brown
• Black wire with tinned end
• Purple
• White/black
• Yellow/black

The following wires require different connections:

• Black wire with ring terminal: Connect to distribution panel mounting screws. This is a new wire needed by this switch.

Sub-harness to support the use of the K&S 12-0040 universal handlebar switch.

No more need to fiddle with butt connectors, soldering, or heat shrink. Just plug the 9-pin connector into the plug that came with your K&S switch, and the other ends into locations inside the headlight. Greatly simplifies installation.

This sub-harness combines the functionality of the original left and right handlebar switches to work with the K&S 12-0040 handlebar switch. Extra ground wire provided because the switch body does not provide the ground. This switch incorporates a kill switch, which cannot be used as a passing light (kill will remain non-functional unless requested). Works with switch pictured below (not included). Many other universal switches would use a very similar wiring harness. I would be happy to create a custom harness for you.

When ordering: Please specify civilian or police handlebars.

The K&S 12-0040 switch is not as popular as the 12-0030 because it lacks a passing light functionality, replacing it instead with a kill switch.

NOTE: Civilian applications refer to the civilian method of wiring turn signals (directly to the flasher). Police applications refer to the police method of wiring turn signals (through the toggle switch located on the dash).

IMPORTANT NOTE: As with all switches actuating higher amperage components, I consider relays for the headlight low and high beam circuits a necessity. I sell a very nice relay kit specifically made for this very purpose.

Installation instructions

Reference the standard installation instructions and these additional notes. Connect the following wires the same as with the original left and right handlebar switches:

• Green
• Green/black
• Brown
• Black wire with tinned end
• Purple
• White/black
• Yellow/black

The following wires require different connections:

• Black wire with ring terminal: Connect to distribution panel mounting screws. This is a new wire needed by this switch.

Sub-harness to support the use of the K&S 12-0041 universal handlebar switch.

No more need to fiddle with butt connectors, soldering, or heat shrink. Just plug the 9-pin connector into the plug that came with your K&S switch, and the other ends into locations inside the headlight. Greatly simplifies installation.

This sub-harness combines the functionality of the original left and right handlebar switches to work with the K&S 12-0041 handlebar switch. Extra ground wires provided because the switch body does not provide the ground. Additional power wire provided for the passing light functionality. Parking lights functionality is always on via the provided jumper wire (switch has no off function). Works with switch pictured below (not included). Many other universal switches would use a very similar wiring harness. I would be happy to create a custom harness for you.

When ordering: Please specify civilian or police handlebars.

The chrome finish and metal housing make the K&S 12-0041 switch an attractive choice. Unfortunately, this switch lacks an off position, leaving the lights on any time the ignition switch is turned on.

NOTE: Civilian applications refer to the civilian method of wiring turn signals (directly to the flasher). Police applications refer to the police method of wiring turn signals (through the toggle switch located on the dash).

IMPORTANT NOTE: As with all switches actuating higher amperage components, I consider relays for the headlight low and high beam circuits a necessity. I sell a very nice relay kit specifically made for this very purpose.

Installation instructions

Reference the standard installation instructions and these additional notes. Connect the following wires the same as with the original left and right handlebar switches:

• Green
• Green/black
• Brown
• Black wire with tinned end
• Purple
• White/black
• Yellow/black

The following wires require different connections:

• Black wires with ring terminals: Connect to distribution panel mounting screws. These are new wires needed by this switch.
• Blue wire: Connect to any open spot on the bottom of the fuse panel (any of the middle 5). This is a new wire needed by this switch.
• Gray/red wire: Connect one end to any open spot on the bottom of the fuse panel (any of the middle 5). Connect the other end to the original location on the distribution panel. This configuration is needed because this switch does not provide an off position.

Sub-harness to support the use of the K&S 12-0055CN universal handlebar switch.

No more need to fiddle with butt connectors, soldering, or heat shrink. Just plug the 9-pin connector into the plug that came with your K&S switch, and the other ends into locations inside the headlight. Greatly simplifies installation.

This sub-harness combines the functionality of the original left and right handlebar switches to work with the K&S 12-0055CN handlebar switch. Extra ground wires provided because the switch body does not provide the ground. Additional power wire provided for the passing light functionality. Parking lights functionality is always on via the provided jumper wire (switch has no off function). Works with switch pictured below (not included). Many other universal switches would use a very similar wiring harness. I would be happy to create a custom harness for you.

When ordering: Please specify civilian or police handlebars.

The narrow width of the K&S 12-0055CN switch makes it an attractive choice. Unfortunately, this switch lacks a parking light functionality, leaving the lights on any time the ignition switch is turned on.

NOTE: Civilian applications refer to the civilian method of wiring turn signals (directly to the flasher). Police applications refer to the police method of wiring turn signals (through the toggle switch located on the dash).

IMPORTANT NOTE: As with all switches actuating higher amperage components, I consider relays for the headlight low and high beam circuits a necessity. I sell a very nice relay kit specifically made for this very purpose.

Installation instructions

Reference the standard installation instructions and these additional notes. Connect the following wires the same as with the original left and right handlebar switches:

• Green
• Green/black
• Brown
• Black wire with tinned end
• Purple
• White/black
• Yellow/black

The following wires require different connections:

• Black wires with ring terminals: Connect to distribution panel mounting screws. These are new wires needed by this switch.
• Blue wire: Connect to any open spot on the bottom of the fuse panel (any of the middle 5). This is a new wire needed by this switch.
• Gray/red wire: Connect one end to any open spot on the bottom of the fuse panel (any of the middle 5). Connect the other end to the original location on the distribution panel. This configuration is needed because this switch does not provide an off position.

Sub-harness to support the use of the Yamaha YHA205 & YHA206, Suzuki 577-6 & 577-8, Kawasaki 004 (and similar) handlebar switches.

Combines the functionality of the original left and right handlebar switches. Butt connectors and heat shrink are included to splice the sub-harness directly to the wires from the switch. Wires should be staggered to yield a smaller overall finished diameter. Several sizes of sheathing are also included for a finished appearance. Switch body provides ground, as original. Many other universal switches would use a very similar wiring harness. I would be happy to create a custom harness for you.

When ordering: Please specify civilian or police handlebars.

NOTE: Civilian applications refer to the civilian method of wiring turn signals (directly to the flasher). Police applications refer to the police method of wiring turn signals (through the toggle switch located on the dash).

IMPORTANT NOTE: As with all switches actuating higher amperage components, I consider relays for the headlight low and high beam circuits a necessity. I sell a very nice relay kit specifically made for this very purpose.

Solution to support 4-way flashers with the police toggle switch

From the factory, the police toggle switch only operated front or rear flashers, but not both front and rear flashers. These simple adapters add 4-way flasher capability without any modification to the original wiring harness. Toggle switch sold separately. Both required adapters are included.

To install, plug in the adapters as shown, then plug the existing white/black and yellow/black wires into the connectors. The remaining two terminals on the toggle switch will no longer be connected.

Sub-harness to support the use of two element rear turn signals

A simple and elegant solution for splitting the power at the tail light for dual element rear turn signals. Typically the dim circuit is used as running lights and the bright circuit is used for the rear turn signals.

Crimp the provided male bullet terminals to pigtail wires coming from the turn signals (for the running or parking lights), then join those two wires into the adapter. The yellow wire from the main harness will also plug into the adapter. Finally, the short yellow wire will plug into the tail light.

Sub-harness to support the use of two element front turn signals

A simple and elegant solution for splitting the power at the distribution block for dual element front turn signals. Typically the dim circuit is used as running lights and the bright circuit is used for the front turn signals.

Using the provided wires and sheathing, extend the existing pigtail wires coming from the turn signals (for the running or parking lights), then join those two wires into the adapter inside the headlight shell. The yellow wire from the main harness will also plug into the adapter. Finally, the short yellow wire will plug into the distribution block. Includes butt crimps, heat shrink, and two sizes of sheathing for connecting to the front turn signals.

Sub-harness to extend wiring from running lights inside saddlebags to the tail light

Connector plugs provide an easy way to disconnect wires and remove the panniers. Black wires provide ground via 6 mm terminals at the tail light. Yellow wires provide signal via male bullets terminal at the tail light. Yellow wires connect to the yellow wire at the tail light via the multi-terminal adapter. Provides an extension of 700 mm on either side of the connection plug (~1400 mm total). Includes butt crimps, heat shrink, and sheathing.

Spot light kit

Moto Guzzi never made a spot light. For police models, they provided brackets and wiring to support spot lights (or other front lights), but left it up to the individual police departments to fit their own spot lights. For civilian models, there was never any factory means of powering spot lights.

This complete kit is intended for use on civilian models and provides fused power directly from the battery to a police-style push-pull switch. The push-pull switch is mounted in a stainless steel bracket that is a mirror image of the starter button. The intent is for this bracket to be mounted on the left side clutch perch. From the push-pull switch, wiring is routed to a 3 connection female spade connector located under the tank. The leads from each spot light are connected to the 3 connection female spade connector. Heavy gauge wire is used to provide ample power to the spot lights. Fuse holder accepts an original style torpedo shaped fuse and is nearly identical to the separate fuse holder Moto Guzzi used on the police models.

Installation instructions

Sub-harness to greatly ease installation of wiring on the rear brake light switch

Installing the wires into the rear brake switch is tedious at best. These two sub-harness greatly simplify installation. I like to install these pigtails with the rear brake switch off of the bike. Then I mount the switch and simply plug in the bullet terminals.

Bullet terminals for the needed wires included/installed.

Sub-harness to support the use of Hella bar-end turn signals (civilian applications)

The turn signal flasher location and basic wiring flow remains the same as the original turn signal harness.

Battery positive cable

For civilian applications, this cable is already integrated into the main harness. For police applications, this cable is already integrated with wires to the voltage regulator and ignition switch. Should you wish a separate cable, however, this is what you'll need.

Originally, the terminal at the battery was a post style terminal. Since that style of terminal is very rare today with motorcycle batteries, I've chosen to fit a lug to accept a 6 mm bolt. Cable is 6 AWG and is 830 mm (~32 ¹⁄₂ inch) in total length. If you require something different, please let me know.

Generator ground

Originally the generator was grounded through the body of the generator, through the bracket, to the engine block. Painted generator bodies can insulate the generator and prevent this necessary grounding point. This short wire easily solves the problem.

Magneti Marelli generators: Secure the 6 mm ring terminal under the top nut at the rear of the generator. Secure the 8 mm ring terminal at the frame grounding point inside the U channel (where the cable splitter is attached).

Bosch generators: Secure the 6 mm ring terminal under the 6 mm bolt located on the left side of the generator body. Secure the 8 mm ring terminal at the frame grounding point inside the U channel (where the cable splitter is attached).

Alternator wiring harness

Features the correct plug for the usual Nippondenso / Denso alternators and clones. Works with the alternator kits produced by Greg Field/Bob Nolan or Kevin Hahn of Scrambler Cycle.

Note: This sub-harness is not needed if you are purchasing one of my main harnesses for an Alternator equipped machine. I've already included the plug and correct wiring with those main harnesses. Instead, this is a stand-alone harness to be used with a pre-existing main harness when adding an alternator.

• 12 AWG red wire from the alternator to the battery positive terminal, fit with 6 mm ring terminals at each end.
• 16 AWG black wire from the alternator plug to the positive terminal on the coil.
• Terminal provided for the existing 16 AWG red wire that illuminates the dash light when the alternator is not charging. Clip off the old terminal, crimp on the provided terminal, and insert it into the plug.
• Rubber terminal cover provided for the post at the alternator.

When ordering please specify your coil: Magneti Marelli or Bosch. Magneti Marelli coils accept 5 mm ring terminals. Bosch coils (and many modern aftermarket coils) accept female spade terminals.

Sheathing for the wires inside the rear fender

Originally, Moto Guzzi did not sheath the wires inside the rear fender. This sheathing is sized to fit the parking light, brake light, left turn signal, and right turn signals wires.

Instructions: Cut to length, route wires through sheathing, crimp on male bullet terminals to the end of each wire.

Note: Terminals for these wires will not be crimped on the harnesses. You will need to crimp the terminals after routing the wires through the harness. This is done to ease installation.

Rubber boot/cover for small wire terminals.

Intended to cover smaller wires with ring terminals. Sold each.

• Distributor requires 1 (prefer to use version with larger opening on dual instrument dash consoles).
• Coils that accept ring terminals require 2.
• Generator requires 2.
• Neutral switch requires 1.

Rubber boot/cover for battery cables.

Intended to cover the terminal located at the starter solenoid. Not suitable for fitment at battery terminals. Sold each.

Set of three grommets to fit the headlight bucket

Superb fitment in all three holes.

Set of two grommets to fit the top triple tree

Nice fitment and large inner hole provides ample space for routing wires.

Set of four grommets to fit the holes in the battery tray which accept the tabs from the side covers

These fit in the battery tray and accept the corresponding pins from the side covers/battery covers. These fit very well.

Set of two grommets to fit the holes in the voltage regulator bracket for Bosch voltage regulators

For Bosch voltage regulators. Provides vibration cushioning. These fit the diameter of the holes very well. Then, corresponding spacers (distance tubes) fit nicely inside.

Set of four O-rings to seal the bulb holders on dual instrument civilian dashes

Set of seven O-rings to seal the bulb holders on single instrument police dashes

O-ring to seal the large, 100 mm speedometer to the single gauge civilian or police dash.

This O-ring seals the speedometer to the dash. Sold each.

Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dual gauge civilian dash.

These O-rings seal each gauge to the dash.

Set of two rubber washers to fit between the side cover and the frame.

These rubber washers do an excellent job of keeping the side cover knobs tight and secure and help prevent the loss of the knob or side cover due to vibration.

4 connection female spade connector

A great way to connect four wires without the need for male spade terminals (Moto Guzzi typically did not use male spade terminals on wiring harnesses). Accepts 6.3 mm (¹⁄₄ inch) terminals. Sold each.

Best to use a needle-nosed pair of pliers to insert and remove terminals.

3 connection female spade connector

Just like Moto Guzzi used to split power to the front and rear turn signals (Faston or Mamut number 405). Two are needed for turn signals (one to split power for the left turn signals, another to split power for the right turn signals). Also used to split power to the front spot lights (one needed). Accepts 6.3 mm (¹⁄₄ inch) terminals. Sold each.

• Civilian models with turn signals require two of these.
• Police models with turn signals and spot lights require three of these.

Best to use a needle-nosed pair of pliers to insert and remove terminals.

2 connection female spade connector

A great way to connect two wires without the need for male spade terminals (Moto Guzzi typically did not use male spade terminals on wiring harnesses). These are used on the Tonti framed models (Faston or FasBlok) and could be used in custom applications on the loop frame models. Accepts 6.3 mm (¹⁄₄ inch) terminals. Sold each.

2 connection bullet connector

A great way to connect two male bullet terminals (double bullet connector). Accepts 4 mm (0.157 inch) terminals. Sold each.

Starter button bracket

Bracket to fit the original starter button (22 mm diameter mounting hole). Stainless steel. Very nice. Starter button sold separately. Sold each.

Starter button

Momentary push button switch to actuate the starter. Fits the original bracket perfectly (22 mm diameter mounting hole) and comes complete with set screw terminals just like the original. Sturdy metal housing and nice quality black plastic securing nut. Sold each.

Starter button

Momentary push button switch to actuate the starter. Fits the original bracket perfectly (22 mm diameter mounting hole) and comes complete with set screw terminals just like the original. Nice quality black plastic housing and securing nut. Sold each.

Single terminal bulb holder

A very nice single terminal bulb holder with excellent fitment within the tube that is secured to the dash. Includes color-coded short jumper wire with a 4 mm female bullet terminal or 6.35 mm female spade terminal and quick connector to mate perfectly with the original wiring harness. Accepts standard sized OEM bulbs. ~12 mm OD. Sold each.

When ordering: Please specify wire color and terminal.

• Loop frame models with a single gauge civilian dash require 5 of these bulb holders; all fit with female bullet terminals.
  • Yellow/black (double spiral) - lights on indicator light
  • White wire - speedometer illumination light
  • Green wire - transmission neutral light
  • Gray wire - engine oil pressure light
  • Red wire - generator charging light
• Loop frame models with a dual gauge civilian dash require 3 of these bulb holders; 1 fit with a female bullet terminal and 2 fit with male bullet terminals.
  • Yellow/black (double spiral) - high beam indicator light
  • Black wire - tachometer illumination light
  • Black wire - speedometer illumination light
• Loop frame models with a single gauge police dash require 5 of these bulb holders; 1 fit with a female bullet terminal and 4 fit with male spade terminals.
  • Yellow/black (single spiral) wire - left turn signal indicator light
  • White/black (single spiral) wire - right turn signal indicator light
  • White wire - speedometer illumination light
  • Blue wire - left push pull switch indicator light (typically used to actuate spot lights)
  • Yellow/black (double spiral) - high beam indicator light

Dual terminal bulb holder

A great replacement dual terminal bulb holder and very close to the original in design. Accepts two 6.35 mm female spade terminals, just like the original. Excellent fitment within the tube that is secured to the dash. Accepts standard sized OEM bulbs. ~12 mm OD. Sold each.

• Loop frame models with a single gauge civilian dash require none of these bulb holders.
• Loop frame models with a dual gauge civilian dash require 3 of these bulb holders.
• Loop frame models with a single gauge police dash require 3 of these bulb holders.

Light bulb for gauge and indicator lights

3.36 watt lamp, bayonet base, 500 hour average life, approximately 10 mm (0.41 inch) in diameter. Sold each.

• Loop frame models with a single gauge civilian dash require 5 of these light bulbs, to illuminate the speedometer and each indicator light.
• Loop frame models with a dual gauge civilian dash require 2 of these light bulbs, to illuminate the tachometer and speedometer.
• Loop frame models with a single gauge police dash require 1 of these light bulbs, to illuminate the speedometer.

This bulb may also be used as a city light or pilot light.

Light bulb for gauge and indicator lights

1.728 watt lamp, bayonet base, 1000 hour average life, approximately 10 mm (0.41 inch) in diameter. Sold each.

• Loop frame models with a single gauge civilian dash require none of these light bulbs.
• Loop frame models with a dual gauge civilian dash require 4 of these light bulbs, to illuminate each indicator light.
• Loop frame models with a single gauge police dash require 7 of these light bulbs, to illuminate each indicator light.

Light bulb for tail light

Long life bulb to help prevent failure due to vibration (1157LL), dual element, 26.88 / 8.26 watt lamp, bayonet base, 2400 / 10000 hour average life. Sold each.

• Loop frame models require 1 of these light bulbs.

Light bulb for turn signals and parking lights

Long life bulb to help prevent failure due to vibration (1156LL), single element, 26.88 watt lamp, bayonet base, 2400 hour average life. Sold each.

• Loop frame models with turn signals require 4 of these light bulbs.

Original single fuse holder

One exceedingly cool fuse holder and very close to the original used on the 750 and 850 police models to send power from the fuse box to the left push-pull switch. Perfect for use whenever adding fused circuits for additional functionality. Uses the same ceramic fuses as the original fuse box (carry the same and fewer spares!). Compact size fits easily inside the headlight shell, as original. 25 amp capacity. Price is for one complete fuse holder, 8 amp fuse included. 8 amp is more than sufficient to operate two, 35 watt spot lights (most people fit 35 watt bulbs). Wires not included (shown for assembly reference only). Sold each.

Replacement fuse panel/fuse box

Replacement fuse panel/fuse box to fit all 1967 - 1976 Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles. Fits in the original location within the original headlight bucket without modification. Supports the wiring needs for both civilian and police models. Very well made by Josh Cole. Uses standard glass fuses to achieve a slim form that is actually slightly thinner than the original fuse panel. This gives you as much room as possible to avoid interference with the headlight plug. Accepts female spade terminals. I will fit the required terminals to any harness you purchase from me. Josh also includes female spade terminals and insulators with the fuse panel.

25 amp fuse

Original size and style fuse to fit the original fuse block. Nine required for the original fuse block. Also fits the single fuse holder. Sold each.

Bracket for mounting LED turn signal flashers

Designed specifically for LED flashers that are rubber mounted. Mounting hole is 7 mm in diameter. Sold each.

Bracket for mounting turn signal flashers

Fits standard sized round thermal and electronic flashers. Mounting hole is 6 mm in diameter. Sold each.

Push-pull switch for police dash

Good quality switch with screw-type terminals (as original). 25 amp capacity, should work well with most spot lights or coils without the need for a separate relay. Knob unscrews for fitment to dash. 8 mm × 1 mm threads. Two are needed per police dash. Sold each.

Bracket for push-pull switch

This bracket is identical to the starter button bracket, except the hole is ~8 mm in diameter. The intent is to mount this bracket on the left clutch perch, mirroring the starter button bracket. Then, a push-pull switch may be fit to the bracket and used to conveniently actuate spot lights or other electrical components. Stainless steel. Very nice. Push-pull switch sold separately. Sold each.

Toggle switch for police dash

Good quality sealed switch with six quick connect terminals (as original). 15 amp capacity, on-on double pole double throw, comes complete as shown with mounting hardware (as shown). One is needed per police dash. Sold each.

Installation instructions

Half height toggle switch boot for police dash

Original style half-height boot for the toggle switch used on the police dash. Uses standard ¹⁵⁄₃₂-32 inch threads. Be sure to rotate the toggle with the boot when fitting the boot to the switch. Sold each.

Full height toggle switch boot

Full-height boot for the toggle switch. Uses standard ¹⁵⁄₃₂-32 inch threads. Be sure to rotate the toggle with the boot when fitting the boot to the switch. Sold each.

5 pin mini relay (SPDT) with mounting bracket.

40 amp rating.

Sealed construction. Resistor is used across the coil terminals for long life and reliable service. 40 amp maximum continuous current rating on the normally open circuit. 30 amp maximum continuous current rating on the normally closed circuit.

Great replacement for the starter relay or for use with custom functions. Mounting bracket has a 5.5 mm diameter hole. Sold each.

5 pin mini relay (SPDT) without mounting bracket.

40 amp rating.

Great replacement for the starter relay or for use with custom functions. Sold each.

5 pin mini relay (SPST) without mounting bracket.

Sealed construction. 40 amp maximum continuous current rating.

So far, the only Guzzi I know of that requires this relay is the 1000 S series 2 with the later Digiplex ignition module. As far as I know, all other applications should use MG# 28732560. Sold each.

5 pin micro relay (SPDT) without mounting bracket.

30 amp rating.

Sealed construction. Resistor is used across the coil terminals for long life and reliable service. 30 amp maximum continuous current rating on the normally open circuit. 20 amp maximum continuous current rating on the normally closed circuit.

Used on many later Guzzis. Fits my custom relay solution. Great for use with custom functions. Sold each.