| Diagram | Fig. 2 — CYLINDER AND CRANKSHAFT · ref 46 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1970 |
BSA Connecting rod and crankpin assembly
Connecting rod and crankpin assembly, 41-0548, linking piston to crankshaft in the engine bottom end.
This is the connecting rod and crankpin assembly listed under 41-0548, appearing in the CYLINDER AND CRANKSHAFT section of the parts book. It's the link between the piston and the crankshaft, carrying the up-and-down motion of the piston down to the crank so it can be turned into rotation at the flywheel.
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The catalog description labels this as an assembly, meaning the rod comes with its crankpin as one unit rather than as separate pieces you'd fit individually. That's worth knowing if you're rebuilding a bottom end and trying to figure out what you actually need to order versus what you might already have in the box of parts.
Our records show this part appearing across catalog entries from 1969 into 1970, but we don't have enough here to pin it to a specific model on its own. Give us a call with your frame and engine numbers and we'll confirm it's the right rod and crankpin for what you're working on 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.
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