| Also known as | MC71PB |
| Diagram | Fig. 34 — HEADLAMP AND FLASHER LAMPS · ref 19 |
| Subsystem | electrical |
| Listed in parts books | 1974 |
HARNESS 73/4 T120/140
Main wiring harness for T120/T140 Triumph twins, catalog number 54961593 (aliases MC71PB).
This is the main wiring harness listed in the books as HARNESS 73/4 T120/140, catalog number 54961593, also cross-referenced under MC71PB. It's the trunk of the electrical system on unit-construction Triumph twins of this era, gathering the wiring that runs between the headlamp shell, the switches, the charging and ignition components, and the tail end of the bike into one bound loom rather than a scatter of loose wires.
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The catalog ties this harness to the T120 and T140 family, meaning it's built for bikes on the right-side-shift layout with a front disc brake and a drum rear, the configuration those models carried during this stretch of production. If your bike was one of the ones built during the labor disruptions at the Meriden factory, be aware the wiring on those machines sometimes strayed a bit from the standard layout, so it pays to check your existing harness routing and connector types against this one before you commit to swapping it in.
We don't have a lot more written up on this specific listing beyond what's in the parts book, so if you've got questions about connector styles or exact routing for your particular machine, give us a call and we'll go over it before you order.
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