| Diagram | Fig. 7 — GEAR CLUSTER, CAMSHAFT · ref 45 |
| Listed in parts books | 1970–1972 |
BSA Oil seal — mainshaft bearing
Oil seal for the mainshaft bearing, found in gear cluster/camshaft catalog listings from 1969-1972.
This is an oil seal for the mainshaft bearing, listed in the parts books under 68-0027 (also written 68-27). It shows up in the gear cluster and camshaft section of the catalog, which places it inside the gearbox area where the mainshaft passes through its bearing housing.
Read more
An oil seal like this keeps gearbox oil from working its way out along the shaft where it exits the case, so the bearing stays lubricated and the oil stays where it belongs instead of showing up on the floor or the clutch.
Our record ties this part to catalog appearances from 1969 to 1972, but we don't have a specific model or engine size pinned to it beyond that. Check it against your gearbox before ordering, or call the shop and we'll help confirm fitment.
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, .