The back tire seems to lose grip and get squirrely on my '97 YZ 125 when I really open her up... It's not so bad that I can't go WOT on it, but it feels like sometimes it loses torque because the back tire isn't gripping enough... I don't know if my weight has anything to do with it, I'm pretty small, only 130 lbs. I have Starcross tires on it.
Any ideas?
Any ideas?