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Oh sorry I am a dumbass...
I have a 2002 400EX, I think the speed factor is what I am going for but I don't want to lose the hill climbing ability that I have.. I ride in sand mostly... Hope that helps
Well if you want just a little more top end and not lose your hill climbing power I would suggest going to a 1 tooth smaller rear sprocket. Or maybe a 2 smaller. That will give u a little more top end.