| Also known as | 40-931 |
| Diagram | Fig. 1 — CYLINDER AND CRANKSHAFT · ref 67 |
| Subsystem | engine bottom |
| Listed in parts books | 1969 |
BSA Inlet valve guide
An inlet valve guide for the cylinder top end, keeping the inlet valve stem tracking straight as it opens and closes.
This is an inlet valve guide, the piece pressed into the cylinder that the inlet valve stem rides in and pivots through as it opens and closes. It appears in the CYLINDER AND CRANKSHAFT figure in our catalog records, which places it right in the top end of the engine, working alongside the valve seats and springs to keep the valve tracking true.
Read more
The catalog record for this one shows a single appearance tied to 1969, and it's also listed under the alternate number 40-931, which is the same part written without the leading zero. Beyond that we don't have more detail on this one, so if you're matching it to a specific engine, bring your old guide or the head casting number down to the counter and we'll confirm 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, .