Details
| Also known as | 40-210 |
| Diagram | Fig. 3 — CRANKCASE · ref 7 |
| Subsystem | engine bottom |
| Listed in parts books | 1969 |
BSA Engine sprocket (23 teeth)
Engine sprocket, 23 teeth, listed under the crankcase figure for a single catalog year.
PN · 40-0210
Supersedes 70-8139 — earlier factory number for this part.
This is the engine sprocket, listed as a 23-tooth gear off the crankshaft, showing up in the crankcase section of the parts book for a single model year. It carries drive off the engine into the primary chain, so it's a wear item worth checking whenever you're in the primary case for a chain or clutch job.
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