Wiring harnesses for the Moto Guzzi 350 NTX / 650 NTX

Main harness for the 350 NTX / 650 NTX

Coming soon.

Headlight

Connects the main harness or dash sub-harness to the headlight.

Ground wire for the Motoplat ignition system

Connects the ground terminal on the capacitor (MG# 27710435) to ground.

Main harness to neutral switch

Connects the main harness to the neutral switch.

WANTED: I very much want to reproduce this harness for the 350 NTX and 650 NTX. Should you have this harness suitable for duplication, I would like to speak with you. For more information, e-mail: greg@thisoldtractor.com.

Battery cable - positive

Connects the positive terminal on the battery to the starter solenoid. Cable is 6 AWG and is 370 mm (~14 ¹⁄₂ inch) in total length. The battery lug accepts a 6 mm fastener; the starter solenoid lug accepts an 8 mm fastener. If you require something different, please let me know.

Includes rubber cover for the terminal located at the starter solenoid (MG# 12703000).

Battery cable - negative

Connects the negative terminal on the battery to the ground point on the frame. Cable is 6 AWG and is 370 mm (~14 ¹⁄₂ inch) in total length. The battery lug accepts a 6 mm fastener; the frame ground lug accepts an 8 mm fastener. If you require something different, please let me know.

Main harness to alternator (Bosch)

Connects the main harness to the altnernator (Bosch charging systems only).

WANTED: I very much want to reproduce this harness for the 350 NTX and 650 NTX. Should you have this harness suitable for duplication, I would like to speak with you. For more information, e-mail: greg@thisoldtractor.com.

Replacement wires for Motoplat ECU (2 required)

Replacement wires to repair damaged or deteriorated wires/connectors/terminals associated with the Motoplat ECUs.

Motoplat electronic ignition harness

Connects the two Motoplat ECUs to other components of the ignition system.

Alternator to the voltage regulator (Bosch)

Connects the alternator wiring to the voltage regulator (Bosch charging systems only).

WANTED: I very much want to reproduce this harness for the 350 NTX and 650 NTX. Should you have this harness suitable for duplication, I would like to speak with you. For more information, e-mail: greg@thisoldtractor.com.

Alternator to the voltage regulator (Saprisa)

Connects the alternator wiring to the voltage regulator (Saprisa charging systems only).

WANTED: I very much want to reproduce this harness for the 350 NTX and 650 NTX. Should you have this harness suitable for duplication, I would like to speak with you. For more information, e-mail: greg@thisoldtractor.com.

Fuse box and associated wiring

Replacement fuse block with connection to main harness. Fuse block is of good quality. But, it is not original and the mounting holes do not align perfectly (quite close, but not perfect). It will fit nicely in the available space and you should be able to secure it in place using one of the two original mounting holes.

Main harness to dash (early version of hazard light switch)

Connects the main harness to the dash.

WANTED: I very much want to reproduce this harness for the 350 NTX and 650 NTX. Should you have this harness suitable for duplication, I would like to speak with you. For more information, e-mail: greg@thisoldtractor.com.

Main harness to dash (late version of hazard light switch)

Connects the main harness to the dash.

WANTED: I very much want to reproduce this harness for the 350 NTX and 650 NTX. Should you have this harness suitable for duplication, I would like to speak with you. For more information, e-mail: greg@thisoldtractor.com.

Wire

Not yet able to identify wire or purpose.

WANTED: I very much want to reproduce this harness for the 350 NTX and 650 NTX. Should you have this harness suitable for duplication, I would like to speak with you. For more information, e-mail: greg@thisoldtractor.com.

Front brake light switch

Connect the dash harness to the front brake light switch. Includes a new switch.

Extension cable for front turn signals (2 are required)

Connects the bulb holder inside the turn signal to the turn signal harness. Fits original CEV turn signals that accept a 2.62 mm wide female spade terminal. Fitment to other turn signals is unknown.

Extension cable for rear turn signals (2 are required)

Connects the bulb holder inside the turn signal to the turn signal harness. Fits original CEV turn signals that accept a 2.62 mm wide female spade terminal. Fitment to other turn signals is unknown.

Main harness to tail light

Connects the main harness to the tail light and rear turn signals.

Rubber boot/cover for small wire terminals.

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

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.

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

This O-ring seals the speedometer to the dash.

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.

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

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 (¹⁄₄ inch) terminals. Sold each.

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.

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.

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.

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.

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

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 indicator lights

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

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 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 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 indicator lights

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

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.

Jumper for original fuse block

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

25 amp fuse

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

16 amp fuse

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

Fuse holder

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

15 amp ATO / ATC fuse

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

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.

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

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

Excellent 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.

Half height toggle switch boot

Half-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.

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.