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lilbill said:
i need to get more clearance between my chain and starter housing so I want to try using a 21 tooth sprocket instead of the 23. I've already got a 21 but it's the old style. i've already put a 49 tooth sprocket on the back so I'm hoping i'll still have some top end left.
I think the rule of thumb is for every tooth on the tranny it's 3 on the rear, so if you increase the tranny by 1 you would have to DECREASE the rear by 3 to end up with the same gearing.
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