| Diagram | Fig. 3 — CRANKCASE · ref 15 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1971 |
BSA TACH DRIVE HOUSING A65
Tach drive housing for the BSA A65 crankcase, PN 70-9517.
This is the tach drive housing for the BSA A65, listed in the crankcase section of the parts book under PN 70-9517. It's the small casting that carries the tachometer drive out of the crankcase, giving the drive cable a mounting point and a path out of the engine.
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This is a BSA part, not a Triumph one — the description names the A65 directly, and the manufacturer record backs that up. Catalog listings for it run from 1969 to 1970, so if you're sourcing one for a machine outside that window, check with us before you order.
If you're rebuilding the crankcase area or chasing a tach drive that's leaking or worn at the housing, this is the part to look at. Bring your old one along or have the numbers handy so we can confirm it matches what's on the bench.
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