Gregory Bender

Small block wiring harnesses

Wire harnesses and looms to fit the Moto Guzzi 350 NTX, 650 NTX, 750 NTX, 750 SP, Nevada 350, Nevada 750, V35, V35 Florida, V35 II, V35 Imola, V50, V50 II, V50 III, V50 Monza, V65, V65 Florida, V65 SP motorcycles.

Updated:

To order, e-mail: greg@thisoldtractor.com

Don't see everything you need? Have an old harness you want to replace? Contact me and we'll work together to produce what you want.

Main harnesses for small blocks

Part Number Description Photo Price
MG# 19747180

Main harness for the V50 Monza

I duplicated an original main harness. In construction, I use the same gauge of wire, the same colors and tracers (stripes), the same length and sheathing, the same terminals, etc. All terminals are of the double crimp, strain relief variety.

  • Note: Main harnesses comprise the main - or primary - wiring harness. Each motorcycle also uses ancillary sub-harnesses. The individual sub-harnesses are sold separately.
15 terminal connection that connects to the dash and headlight sub-harnesses.
15 terminal connection that connects to the dash and headlight sub-harnesses.
15 terminal connection that connects to the dash and headlight sub-harnesses.

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12 terminal connection that connects to the left handlebar switch sub-harness.
12 terminal connection that connects to the left handlebar switch sub-harness.
12 terminal connection that connects to the left handlebar switch sub-harness.

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4 terminal connection that connects to the right handlebar switch sub-harness.
4 terminal connection that connects to the right handlebar switch sub-harness.
4 terminal connection that connects to the right handlebar switch sub-harness.

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6 terminal connnection that connects to the alternator sub-harness.
6 terminal connnection that connects to the alternator sub-harness.
6 terminal connnection that connects to the alternator sub-harness.

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Socket for starter relay.
Socket for starter relay.
Socket for starter relay.

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Socket for flashing lights relay.
Socket for flashing lights relay.
Socket for flashing lights relay.

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3 terminal connection for the voltage regulator.
3 terminal connection for the voltage regulator.
3 terminal connection for the voltage regulator.

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6 terminal connnection that connects to the tail light and rear turn signals.
6 terminal connnection that connects to the tail light and rear turn signals.
6 terminal connnection that connects to the tail light and rear turn signals.

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Flat 3 terminal connection for the voltage rectifier.
Flat 3 terminal connection for the voltage rectifier.
Flat 3 terminal connection for the voltage rectifier.

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2 terminal connection for the voltage rectifier.
2 terminal connection for the voltage rectifier.
2 terminal connection for the voltage rectifier.

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Main harness for the V50 Monza.
19747180: Main harness for the V50 Monza.
19747180: Main harness for the V50 Monza.

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USD $180.00

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Components

Part Number Description Photo Price
MG# 90706765

O-ring to seal the large, 100 mm speedometer to the dash.

This O-ring seals the speedometer to the dash.

O-ring to seal the large, 100 mm speedometer to the single gauge civilian or police dash.
90706765: O-ring to seal the large, 100 mm speedometer to the single gauge civilian or police dash.
90706765: O-ring to seal the large, 100 mm speedometer to the single gauge civilian or police dash.

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USD $2.00

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MG# 90706746

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

These O-rings seal each gauge to the dash.

Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dual gauge civilian dash.
90706746: Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dual gauge civilian dash.
90706746: Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dual gauge civilian dash.

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USD $4.00

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MG# 93400964

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 (14 inch) terminals. Sold each.

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

4 connection female spade connector.
93400964: 4 connection female spade connector.
93400964: 4 connection female spade connector.

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USD $3.00

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MG# 93400863 MG# 93400963

3 connection female spade connector

A great way to split power to two devices such as driving lights, front and rear turn signals, etc. (Faston or Mamut number 405). Accepts 6.3 mm (14 inch) terminals. Sold each.

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

3 connection female spade connector.
93400863: 3 connection female spade connector.
93400863: 3 connection female spade connector.

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USD $2.50

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MG# 93400962

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 (14 inch) terminals. Sold each.

2 connection female spade connector.
93400962: 2 connection female spade connector.
93400962: 2 connection female spade connector.

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USD $0.50

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BULLET-CONNECTOR

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.

2 connection bullet connector.
2 connection bullet connector.
2 connection bullet connector.

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USD $0.50

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BULB-HOLDER-SINGLE

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. ~12 mm OD. Sold each.

When ordering: Please specify wire color and terminal.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Single terminal bulb holder.
Single terminal bulb holder.
Single terminal bulb holder.

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USD $5.00

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BULB-HOLDER-DUAL

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.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Dual terminal bulb holder.
Dual terminal bulb holder.
Dual terminal bulb holder.

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USD $5.00

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MG# 17760650

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.

Accepts this style of wedge bulb.
Accepts this style of wedge bulb.

Photo courtesy of McMaster-Carr.

Dual terminal bulb holder.
17760650: Dual terminal bulb holder.
17760650: Dual terminal bulb holder.

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USD $5.00

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MG# 93450322 MG# 93450122

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.

Note: The MG# 93450322 bulbs are longer in overall length, but brighter than MG# 10744910. In general, I recommend MG# 93450322 because they are brighter and easier to see. If you know that your dash requires a shorter bulb, please order MG# 10744910.

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

Light bulb for gauge and indicator lights.
93450322: Light bulb for gauge and indicator lights.
93450322: Light bulb for gauge and indicator lights.

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USD $0.75

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MG# 10744910

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.

Note: The MG# 93450322 bulbs are longer in overall length, but brighter than MG# 10744910. In general, I recommend MG# 93450322 because they are brighter and easier to see. If you know that your dash requires a shorter bulb, please order MG# 10744910.

Light bulb for gauge and indicator lights.
10744910: Light bulb for gauge and indicator lights.
10744910: Light bulb for gauge and indicator lights.

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USD $0.75

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MG# 14744910

Light bulb for indicator lights

2 watt lamp, bayonet base, 1000 hour average life, approximately 7 mm (0.28 inch) in diameter. Sold each.

Light bulb for indicator lights.
14744910: Light bulb for indicator lights.
14744910: Light bulb for indicator lights.

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USD $1.00

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MG# 93450224

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.

Light bulb for tail light.
93450224: Light bulb for tail light.
93450224: Light bulb for tail light.

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USD $1.50

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MG# 93450129

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.

Light bulb for turn signals and parking lights.
93450129: Light bulb for turn signals and parking lights.
93450129: Light bulb for turn signals and parking lights.

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USD $1.50

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MG# 17762150

Light bulb for gauge and indicator lights

3.78 watt lamp, wedge base, 2500 hour average life, approximately 10 mm (0.41 inch) in diameter. Sold each.

Light bulb for gauge and indicator lights.
17762150: Light bulb for gauge and indicator lights.
17762150: Light bulb for gauge and indicator lights.

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USD $0.75

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MG# 93450140

Light bulb for indicator lights

1.40 watt lamp, wedge base, 500 hour average life, approximately 5 mm (0.23 inch) in diameter. Sold each.

Light bulb for indicator lights.
93450140: Light bulb for indicator lights.
93450140: Light bulb for indicator lights.

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USD $0.75

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MG# 12734900

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 bracket.
12734900: Starter button bracket.
12734900: Starter button bracket.

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USD $15.50

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MG# 26735001

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.
26735001: Starter button.
26735001: Starter button.

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USD $20.00

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MG# 26735001-BLACK

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.

Starter button.
26735001: Starter button.
26735001: Starter button.

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USD $14.00

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MG# 17743000

Original fuse block

New production, very good quality fuse box. Accepts six fuses (MG# 17742550 or MG# 12742500). Comes with clear cover and two jumpers. Additional jumpers available. Sold each.

Fuse box
Fuse box
Fuse box

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Fuse box
Fuse box
Fuse box

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Fuse box
17743000: Fuse box
17743000: Fuse box

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USD $42.00

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MG# 17743000-JUMPER

Jumper for original fuse block

Jumper connection used to join multiple fuse circuits. Fits the original fuse box. Sold each.

Jumper for original fuse block
17743000: Jumper for original fuse block
17743000: Jumper for original fuse block

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USD $1.50

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MG# 12742500

25 amp fuse

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

25 amp fuse.
12742500: 25 amp fuse.
12742500: 25 amp fuse.

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USD $0.50

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MG# 17742550

16 amp fuse

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

16 amp fuse.
17742550: 16 amp fuse.
17742550: 16 amp fuse.

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USD $0.50

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MG# 28743060

Fuse holder

Single fuse holder that may be connected to other single fuse holders to form a row. Sold each. Fuses sold separately.

Fuse holder.
28743060: Fuse holder.
28743060: Fuse holder.

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USD $2.50

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MG# 28742560

15 amp ATO / ATC fuse

As used on many modern Guzzis accepting blade style fuses. Sold each.

15 amp ATO / ATC fuse.
28742560: 15 amp ATO / ATC fuse.
28742560: 15 amp ATO / ATC fuse.

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USD $0.25

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POST-TO-SPADE-ADAPTER

5 mm post to 6.3 mm male spade adapter

~5 mm diameter hole permits fitment to the neutral switch and dash grounding points (as original). One required per neutral switch. Dash usage varies by model. Sold each.

5 mm post to 6.3 mm male spade adapter.
5 mm post to 6.3 mm male spade adapter.
5 mm post to 6.3 mm male spade adapter.

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USD $0.50

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MG# 10750550 MG# 13741540

Flasher

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

Flasher.
10750550: Flasher.
10750550: Flasher.

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USD $3.25

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MG# 12745760

Push-pull switch

Good quality switch with screw-type terminals. 25 amp capacity. 8 mm × 1 mm threads. Knob unscrews for fitment. Sold each.

Push-pull switch.
12745760: Push-pull switch.
12745760: Push-pull switch.

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USD $5.00

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MG# 12734900ALT

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.

Bracket for push pull switch.
12734900: Bracket for push pull switch.
12734900: Bracket for push pull switch.

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USD $15.50

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MG# 13745740 MG# 17745760 MG# 18745701

Toggle switch

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

Toggle switch.
13745740: Toggle switch.
13745740: Toggle switch.

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USD $12.50

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TOGGLE-BOOT

Half height toggle switch boot

Half-height boot for the toggle switch. Uses standard 1532-32 inch threads. Be sure to rotate the toggle with the boot when fitting the boot to the switch. Sold each.

Half height toggle switch boot.
Half height toggle switch boot.
Half height toggle switch boot.

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USD $4.00

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TOGGLE-BOOT-FULL

Full height toggle switch boot

Full-height boot for the toggle switch. Uses standard 1532-32 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 toggle switch boot.
Full height toggle switch boot.

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USD $4.00

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MG# 12732500

5 pin mini relay 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, flashing lights relay, or for use with custom functions. Mounting bracket has a 5.5 mm diameter hole.

40 amp, 5 pin mini relay with mounting bracket.
12732500: 40 amp, 5 pin mini relay with mounting bracket.
12732500: 40 amp, 5 pin mini relay with mounting bracket.

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USD $5.00

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MG# 28732560 MG# 30732510

5 pin mini relay without mounting bracket.

40 amp rating.

Great replacement for the starter relay, flashing lights relay, horn relay, or for use with custom functions.

40 amp, 5 pin mini relay without mounting bracket.
28732560: 40 amp, 5 pin mini relay without mounting bracket.
28732560: 40 amp, 5 pin mini relay without mounting bracket.

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USD $5.00

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MG# 30732560

5 pin micro relay 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.

35 amp / 25 amp, 5 pin micro relay without mounting bracket.
30732560: 35 amp / 25 amp, 5 pin micro relay without mounting bracket.
30732560: 35 amp / 25 amp, 5 pin micro relay without mounting bracket.

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USD $5.00

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CRIMPER

Crimper for non-insulated, open barrel terminals

Inexpensive tool for crimping non-insulated, open barrel terminals. No, it is not a top-of-the-line ratcheting crimper. Nor does it handle heavy duty (thick) terminals. But it is perfectly adequate for occasional use, and inexpensive.

Close up of crimper.
Close up of crimper.
Close up of crimper.

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Crimper for non-insulated, open barrel terminals.
Crimper for non-insulated, open barrel terminals.
Crimper for non-insulated, open barrel terminals.

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USD $10.00

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