| Also known as | MC 28H PB |
| Diagram | Fig. 26 — ELECTRICAL EQUIPMENT (PART 1) · ref 11 |
| Listed in parts books | 1971–1972 |
HEADLAMP HARNESS 71-2 650
Cloth-bound headlamp sub-wiring harness for 1971-72 oil-in-frame 650 twins.
This is the headlamp harness for the 71-2 650 twins, the sub-wiring loom that lives inside the headlamp shell and ties together the switches, warning lights, and connections that all come together behind the headlamp glass. It is cloth-bound in the original style, matching the wiring these bikes left the factory with.
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The catalog description ties this one specifically to the oil-in-frame 650 twins built for the 1971 and 1972 model years, and it shows up in Lucas's own numbering as well as under the Triumph/BSA parts book number stamped on this listing. If your bike's harness has gone brittle, cracked, or been hacked at by a previous owner, this is the piece to replace rather than trying to patch the original.
Wiring like this is one of those jobs where getting the right harness saves a lot of headaches down the line, since a headlamp shell full of mismatched or spliced wiring is no fun to sort out at 2am on the side of the road. Check the wiring diagram for your specific model before you start pulling the old one out.
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