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Originally Posted by jackbauer
Not sure i understand why a smaller drive sprocket would cause the chain to hit the arm.
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With less teeth the sprocket diameter gets smaller, so the chain tapers more toward the front, and the gap that the swingarm sits in gets narrower.
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Anyway I have an option on a 50t driven sprocket so i could use a 14t drive to get almost the same 3.58:1 ratio which is only one tooth less than stock
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If that's the sort of ratio you want, I'd use the larger sprockets.