| Also known as | 40-327 |
| Diagram | Fig. 3 — CRANKCASE · ref 8 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1970 |
BSA Engine sprocket spacer (·294—·297"; 7·467—7·543 mm.)
An engine sprocket spacer, .294-.297 in. thick, from the crankcase area of the bottom end.
This is the engine sprocket spacer, listed in the CRANKCASE section of the parts books, and it comes in a specific thickness range of .294 to .297 inches (about 7.467 to 7.543 mm). It sits on the crankshaft where the engine sprocket locates, taking up the right clearance so the sprocket sits correctly against its shoulder.
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The catalog entry shows this alongside the 40-327 form of the number, same part, older style number. It shows up across catalog appearances from 1969 to 1970.
It's a small, easy to overlook piece, but getting the spacer thickness right matters for how the sprocket seats and runs true. If you're rebuilding the bottom end, have this on hand rather than trying to reuse a worn or mismatched one.
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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