| Also known as | B123B, E8112 |
| Diagram | Fig. 1 — CYLINDER AND CRANKSHAFT · ref 73 |
| Subsystem | engine bottom |
| Listed in parts books | 1968, 1970–1971 |
INLET VALVE A50/B25 UK
Inlet valve listed for BSA A50/B25 engines, alias B123B.
This is an inlet valve listed for the A50 and B25 models, cataloged under UK spec. The description names those two model designations plainly, but they're BSA model lines, not Triumph, so despite showing up in our Triumph-numbered records, this valve belongs on a BSA engine, not a Triumph twin.
Read more
The old alias for this part is B123B, which is worth having on hand if you're working from an older parts book or cross-referencing a used part bin.
We don't have more detail on this one beyond what the catalog line tells us. If you're sourcing this for a rebuild, call the shop and we'll confirm fitment against your specific engine before you order.
Sorry if we got something wrong here. If you think this information isn't correct, .