| Also known as | NMT2180E, T2180E |
| Listed in parts books | Not catalogued by year yet |
ENGINE SPROCKET 21 TEETH
21 tooth engine sprocket for the primary drive, part number 57-2180E.
This is the 21 tooth engine sprocket, part number 57-2180E, sometimes shown in older parts books as T2180E or NMT2180E. It mounts on the gearbox mainshaft end and carries the primary chain drive from the engine into the primary case.
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Tooth count on an engine sprocket sets the overall gearing, so before ordering double check what your bike currently runs and what your parts book calls for. We don't have more detail on this one beyond the tooth count and the part number itself, so if you're unsure whether 21 teeth is the right count for your setup, give us a call and we'll sort it out before you order.
If you're replacing a worn sprocket, it's worth having a look at the primary chain and clutch sprocket at the same time since they wear as a set.
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