| Diagram | Fig. 9 — CLUTCH AND PRIMARY CHAINCASE · ref 32 |
| Subsystem | primary |
| Listed in parts books | 1969–1972 |
BSA Key, sleeve to mainshaft
A small locating key that keys the sleeve to the mainshaft inside the clutch and primary chaincase assembly.
This is a small key that locates the sleeve on the mainshaft inside the clutch and primary chaincase assembly. It's the kind of part nobody thinks about until it's missing or worn, and then the sleeve starts spinning where it shouldn't and things get sloppy in a hurry inside the primary drive.
Read more
Our catalog record ties it to the clutch and primary cover area, appearing across a handful of parts-book listings from the late '60s into the early '70s. It's a mechanical, unglamorous piece, but the whole primary drive train depends on small keys like this staying put and doing their job.
If you're rebuilding a primary chaincase or chasing a clutch that isn't behaving, this is worth checking along with the sleeve and mainshaft it locates. Call the shop if you want us to confirm fitment before you order.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
Sorry if we got something wrong here. If you think this information isn't correct, .