| Listed in parts books | Not catalogued by year yet |
SPROCKET,REAR 66-70 57T
57-tooth rear sprocket cataloged for 1966-70 machines.
This is a rear wheel sprocket, 57 tooth, cataloged for the 66-70 era. The part number 37-1499/57 tells you the tooth count right in the number, and that's the main thing to check against what you're pulling off the bike.
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Rear sprockets like this bolt to the wheel hub and mesh with the final drive chain, translating gearbox output into rear wheel motion. Tooth count is what sets your overall gearing, so swapping tooth counts changes how the bike pulls and how it feels at highway speed versus off the line.
We don't have much more detail on this one beyond the catalog line itself. If you're matching an existing sprocket, count the teeth and compare to your old part before ordering, and give us a call if anything doesn't line up.
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