I rode my YZ125 hard for the first time yesterday at practice. It seems to be geared too high, I was in second gear most of the time and had to go into first in the corners. It has a 13 tooth front sprocket and a 50 tooth rear, I weigh 225lbs, so I was thinking of putting on a 12 tooth front sprocket. In a striaght line drag race it goes good, but I seem to have a hard time keeping the revs up on the track. Any thoughts?