| Also known as | 40-917 |
| Diagram | Fig. 1 — CYLINDER AND CRANKSHAFT · ref 49 |
| Subsystem | engine bottom |
| Listed in parts books | 1969 |
BSA Big-end shell (—.010")
Big-end shell ground .010" undersize for a reground crankshaft journal.
This is a big-end shell for the crankshaft, ground .010 undersize for a rebuild where the crankpin has been reground. It shows up in the CYLINDER AND CRANKSHAFT section of the parts book, which is where the connecting rod bearings live in this engine.
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The .010" undersize means it is meant to be fitted against a crankpin that has already had material removed and been reground to that size, not a standard-size journal. If you are not certain your crank has been reground to this undersize, do not assume this shell is the right one for your rebuild.
Our catalog record only ties this one appearance to 1969, so we cannot speak to how far back or forward this shell was used. Call the shop with your crankpin measurements before you order so we can confirm it is the right undersize for your engine.
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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