| Diagram | Fig. 11 — CLUTCH AND PRIMARY CHAINCASE · ref 54 |
| Subsystem | primary |
| Listed in parts books | 1970–1972 |
BSA Primary chain cover complete
BSA primary chaincase cover, complete assembly, from catalog listings dated 1970–1972.
This is the primary chaincase cover, the outer housing that bolts over the primary chain, clutch, and alternator on the left side of the engine. It's listed as complete, so it comes as the full cover assembly rather than just a bare casting.
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The catalog places this part under BSA clutch and primary chaincase figures, so it belongs to the BSA side of the shop's inventory rather than Triumph. Our records tie it to catalog appearances running 1970 to 1972.
If you're chasing this one down, check it against your own primary case setup before ordering — the catalog entry doesn't spell out every model it fits, and primary covers vary in shape and mounting between years and engine families.
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