I went to go race in a mini motor league for a day . stock XR 100 class with street tires. you can only lean so much before you are just grinding your pegs to nothing. I learned so much about body positioning that day . by the end I was taking turns much faster than when I started and had less lean angle too. get on a track ( or a parking lot with lots of space?) and start playing with different body positions and see how it effects the lean angle. When you are totally hanging off and on the edge of your tires you know you are cooking( and probably shouldn't be going that fast on the street any way! )