| Listed in parts books | Not catalogued by year yet |
C/S SPROCKET 15T UNIT 650
A 15-tooth gearbox countershaft sprocket for unit-construction 650 twins.
This is a gearbox sprocket, cut with 15 teeth, for the unit-construction 650 twins. The catalog lists it under 57-1915/15, and that number tells you both the base part family and the tooth count in one string.
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The countershaft sprocket sits on the end of the gearbox mainshaft and carries the final drive chain back to the rear wheel. Tooth count on this sprocket is one of the two numbers (along with the rear wheel sprocket) that sets your overall gearing, so swapping a 15T in for a different count changes how the bike pulls versus how fast it spins at speed.
Our records on this one are thin beyond the basic listing, so if you're not sure this is the tooth count and spline pattern your gearbox needs, give us a call before you order and we'll help confirm fitment.
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