| Diagram | Fig. 4 — CRANKSHAFT · ref 11 |
| Subsystem | engine bottom |
| Listed in parts books | 1970 |
BSA Flywheel only
A flywheel, sold on its own, from the crankshaft assembly section of the parts book.
This is a flywheel, listed on its own in the crankshaft section of the parts book. A flywheel is the heavy rotating mass on the crank assembly that smooths out the power pulses between firing strokes and keeps the engine turning evenly at idle and low revs.
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The catalog entry here is brief - it shows up once, tied to a 1970 listing, with no further detail on dimensions, weight, or which specific crank assembly it mates to. If you're rebuilding a bottom end and need to match this against what's currently in your engine, bring the old part down or have your crank case numbers ready.
Given how little the record tells us beyond the part name and its place in the crankshaft figure, call the shop and we'll confirm fitment 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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