| Also known as | 40-0210, E8139 |
| Diagram | Fig. 2 — CRANKCASE · ref 89 |
| Subsystem | engine bottom |
| Listed in parts books | 1968, 1970–1971 |
ENGINE SPROCKET 250
Engine sprocket for the 250 model, drives the primary chain off the engine's output shaft.
This is an engine sprocket listed for the 250 model, part number 70-8139. It's the sprocket that mounts on the engine's output shaft and drives the primary chain, transferring power from the crankshaft toward the clutch and gearbox.
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Our records show this part was later renumbered to 40-0210, so if you're working from a newer parts book and see that number, it's the same physical piece. We don't have much more detail on file for this one beyond the description, so if you've got questions on fitment for your particular 250, give us a call before you order and we'll confirm it against your bike.
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