For sale Wiring harnesses for Moto Guzzis

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.

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 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.

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.

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.

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 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.

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.

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.

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 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.

Left handlebar switch

Ready to solder to your switch (MG# 12746020 or MG# 12746001). Please specify civilian or police handlebars.

If you need to purchase a new switch, I strongly recommend purchasing the style that requires no soldering. Instead, the wires are secured withe set screws. MG Cycle sells such an item: part number 12746001B.

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.

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.

Rear brake light switch to brake light

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

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 in) in total length. If you require something different, please let me know.

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 in) in total length. If you require something different, please let me know.

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.

Tail light

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.

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.

Please specify charging system and starter combination: Magneti Marelli, Bosch, Alternator.

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).

Fuse box to dash

Fuse box to dash

Indicator light interconnect

Connects several of the lights on the dash.

Ignition switch (includes wires to rear turn signals)

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

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

Wiring and terminals are specific to each charging system.

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.

Turn signals

Connects the toggle switch on the dash to the “Y” splitters. Supports turn signal and rear flasher functionality

Connects the fuse block (via a separate fuse holder) to the left push-pull switch.

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.

Turn signals & spot lights

This harness serves a couple of important functions:

• For the turn signals, it connects the “Y” splitters to the dash indicator lights.
• For the spot lights, it connects the left push-pull switch to the “Y” splitter and associated dash indicator bulb.

Spot light extensions

Moto Guzzi never made a spot light. Instead, they provided bracketry 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 the spot lights of your choice to the “Y” splitter for the spot lights. Comes complete with butt crimps, heat shrink, and sheathing.

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).

Direct link to image

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

Direct link to image

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).

Direct link to image

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).

Direct link to image

Indicator light interconnect (early)

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

Indicator light and tachometer positive terminal interconnect (late)

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

Short pigtail for indicator light (neutral)

Short pigtail for indicator light (oil pressure)

Short pigtail for indicator light (generator)

Gauge/instrument illumination interconnect

Tachometer ground

Distributor to tachometer (early)

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

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.

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 condensor).

All models with a front brake light switch

Right handlebar switch

Ready to solder to your switch. Please specify civilian or police handlebars. Works with switch pictured below (not included).

Direct link to image

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.

Front turn signals

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.

Relay solution for the starter and headlight

No more excuses! Relays greatly improve the performance of the starter and headlight. Your starter will spin faster and your headlights will burn brighter when you use relays. Relays also drammatically 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.
• A flasher bracket is included.
• Includes a new headlight plug and starter relay harness (a USD $15.75 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 all three needed relays.
• Simple installation - bolt on the bracket, route the wires, plug in to the terminals (Installation instructions here).

Neat, complete installation.

Neat, complete installation.

Direct link to image

Once installed, the relays can be replaced without the need to remove the relay bracket or voltage regulator.

Once installed, the relays can be replaced without the need to remove the relay bracket or voltage regulator.

Direct link to image

Headlight bucket remains clean and uncluttered.

Headlight bucket remains clean and uncluttered.

Direct link to image

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

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. 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.

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).

Direct link to image

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

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. 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.

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).

Direct link to image

Sub-harness to support the use of the Yamaha YHA206 & YHA206, Suzuki 577-6, 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.

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).

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.

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 postive 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.

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.

Direct link to image

Direct link to image

Direct link to image

Fuse box to replace the original unit

This replacement fuse box mounts directly in the original location using the original size fasteners without any need for modification of the headlight whatsoever. This fuse block accepts up to six ATO/ATC style fuses. While it comes complete with a clear plastic dust cover with fastening nut, these will foul the headlight plug when used. The maximum load per fuse is 30 amp with a 90 amp limit for the entire block of six fuses. However, I strongly recommend using 15 amp fuses in each slot (fuses included).

I modify each fuse box to join two sets of circuits. This is done to mimmick the linked terminals in the original fuse block and greatly reduces the wiring complexity otherwise needed.

For civilian applications, the six total circuits are more than sufficient. The original fuse panel had nine fuse circuits. Four wires were plugged into the top and four wires were plugged into the bottom. This leaves two top and two bottom connections completely free for use.

For police applications, the six total circuits and four linked circuits are just right. The original fuse panel had nine fuse circuits. Six wires were plugged into the top and five wires were plugged into the bottom. This leaves one bottom connections free for use.

Physical fitment within the longer, V700 headlight bucket is no problem at all, as there is ample room between the headlight plug and the fuse block. Physical fitment within the shorter headlight bucket is quite close, but it does fit. When a sealed beam halogen bulb is used along with the original headlight plug, there is just enough room for the fuse block.

Set of three grommets to fit the headlight bucket

Superb fitment in all three holes.

“Faston” or “Mamut number 405” 3 connection “Y” splitter

Just like Moto Guzzi used to split power to the front and rear turn signals. Two are needed for turn signals (one to split power for the left turn signals, another to split power for the right turn siganls). Also used to split power to the front spot lights (one needed). 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.

“Faston” or “FasBlok” 2 connection “I” splitter / quick 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 and could be used in custom applications on the loopframe models. Sold each.

Original 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).

25 amp original fuse

Original size and style fuses to fit the original fuse block. Colors vary. Fits above fuse holder. Sold each.

Starter button

Momentary push button to actuate the starter. Fits the original bracket perfectly and comes complete with set screw terminals just like the original. 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 to mate perfectly with the original wiring harness. Accepts standard sized OEM bulbs. Sold each.

Refer here for information about the bulb holder requirements for each dash.

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. Sold each.

Refer here for information about the bulb holder requirements for each dash.

Fasher

Standard thermal replacement flasher for turn signal or rear flasher use. Flashes up to four, 27 watt bulbs simultaneously. Sold each.

Bracket for mounting turn signal flashers

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

Push-pull switch for police dash

Economical switch with screw-type terminals (as original). 15 amp capacity, should work well with most spot lights or coils without the need for a separate relay. Knob unscrews for fitment to dash. Two are needed per police dash. Sold each.

Toggle switch for police dash

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

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 in threads. Sold each.

Strip of 12 “Faston” or “FasBlok” 2 connection “I” splitter / quick 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 and could be used in custom applications on the loopframe models. Sold as a single strip of twelve.

20 amp original fuse

Original style fuses to fit the original fuse block. Sold each.

These have more than sufficient amperage for use throughout the fuse block. Limited quantities and sold at a discount.

AGC fuse holder

Customize your harness any way you like with this fuse holder. Very easy to solder the wire to the ends (do not crimp). Accepts up to 14 AWG wire and ¹⁄₄ in diameter × 1 ¹⁄₄ in long AGC fuses. Compact size. Price is for one complete fuse holder, 15 amp fuse included, wires and additional terminals not included (shown for assembly reference only).

15 amp AGC fuse

Fits above fuse holder. Sold each.

ATO / ATC fuse holder

This fuse holder is quite nice. Heavy 12 AWG wire, 7 in in length. Weather resistant seal. Mounting hole is 5 mm in diameter. Price is for one fuse holder, 15 amp fuse included.

15 amp ATO / ATC fuse

Sold each.