CRF450 15-Tooth Countershaft

[Rjuan]

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.

[chris brown]

my buddy has a 15 on his 02, just had to file down the nub slightly.

[Super Mato]

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.

[Rjuan]

Thanks guys.

[biznatcho]

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.