| Diagram | Fig. 3 — CRANKCASE · ref 27 |
| Subsystem | engine bottom |
| Listed in parts books | 1969 |
BSA Washer, oil pressure release valve (41/64"×1"×1/32")
Flat washer (41/64" x 1" x 1/32") fitted under the oil pressure release valve in the crankcase.
This is the washer that seats under the oil pressure release valve in the crankcase, part number 67-1498. It's a small flat washer sized 41/64 in. by 1 in. by 1/32 in., meant to sit against the release valve so it seals and locates properly when the valve assembly is torqued down.
Read more
It shows up in the crankcase area of the catalog, tied to the oil pressure release valve, and also turns up listed under the gearchange mechanism figure in our records. That's just how the parts books grouped it in 1969 catalog listings — the washer itself is an engine bottom-end part, not a gearbox part.
It's a simple item but worth having on hand when you're servicing the release valve, since a tired or damaged washer here can let oil pressure bleed off where it shouldn't. Give us a call if you want to confirm it matches what's on your bike before ordering.
Sorry if we got something wrong here. If you think this information isn't correct, .