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Originally Posted by RAC
So I think it's time for a new chain and spocket. What is the difference between these 520 conversion kits I see and stock and which is better???? Thanks guys!
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The #'ing is for size. Most stock bikes have a 525. Bigger bikes can have a 530. 520 conversion user a smaller chain with smaller sprocket teeth(size wise.) The bennies to a 520(less rotating mass) aren't really noticed for street use. Track days sure, racing definitely. If you do decide to do the 520, DID ERV3 w/Afam sprockets are the way to go
