| Diagram | Fig. 3 — CYLINDER BARREL — EXHAUST PIPES — VALVES · ref 8 |
| Subsystem | engine top |
| Listed in parts books | 1971–1972 |
BSA Exhaust pipe — left
Left-hand exhaust header pipe for the BSA A65 twin, 1971-72.
This is the left-hand exhaust pipe for the BSA A65 twin, as shown in the CYLINDER BARREL — EXHAUST PIPES — VALVES section of the parts book. It's the header pipe that runs from the left exhaust port down and back, carrying spent gases away from that cylinder.
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Catalog listings tie this pipe to the A65 line for the 1971-72 model years, and it's cataloged alongside a matching right-hand pipe (71-2045) as part of a header set. Some versions of that set included a cross-over balance pipe as well, so if your bike has one, check that it's accounted for when you're sorting out a full exhaust system.
This is a BSA part, not a Triumph part, despite showing up here at the shop's counter — worth double-checking against your bike before you order, since left and right pipes aren't interchangeable and the catalog only ties this one to the A65 for those two years.
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