2002 CR125r. Stock gearing right now. I am thinking of adding one or two teeth to the rear. I know its a 125, but it seems to be lacking a tad in the low end. I have it jetted very well, and I can handle it usually with clutching, but I would like to see the difference. I dont wanna make too many changes because the bike doesnt have that great of top end speed to begin with, but I can sacrifice it. What do you guys run?