| Diagram | Fig. 1 — CYLINDER HEAD, EXHAUST PIPE · ref 36 |
| Subsystem | engine top |
| Listed in parts books | 1969–1970 |
BSA Exhaust valve lifter lever
The exhaust valve lifter lever used to manually release the exhaust valve at the cylinder head.
This is the exhaust valve lifter lever, the small pivoting piece that lets the rider manually lift the exhaust valve off its seat. It shows up in the parts book under the cylinder head and exhaust pipe figures, which places it right at the top of the engine where the valve gear meets the head casting.
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A valve lifter lever like this is typically linked to a cable or rod running to a handlebar lever, giving the rider a way to release compression for kickstarting or for stopping the engine without cutting the ignition. It's a simple mechanical piece with no seals or wear surfaces beyond the pivot itself, but it takes a beating every time it's used, so a tired or worn one is worth checking if the compression release feels soft or won't hold.
Our catalog record shows this part appearing in listings from 1969 to 1970. We don't have more detail than that on which specific machines it was fitted to, so give us a call and we'll confirm fitment before you order.
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