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CRF450 15-Tooth Countershaft

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Will a 15-tooth countershaft fit on a 2002 CRF450 without any modification besides removing that worthless case guard? I remember reading that a nub needs to be removed from the swing arm, but that might have been on a CRF250.

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You will also need to modify the swingarm pivot rubber slider so the teeth on the sproket will clear it. A bench grinder will remove the material after you have marked it with a felt tip pen.

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I did this conversion on mine, I had my buddy grind down the swingarm nub, and I had to flip the countershaft and put washers between the rear sprocket & hub. I think I have a 46 rear, and the 15 front is great for buttonwillow, but i think it's too high for horsetheif.....unless i was being passed because my bike is running stock & crappy (which it is). I'm going 14 front at the next motard/kart track.

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