i'M NEW TO THE 2 STROKES, I just bought a 91 cr 125 to paly with. I'll be mostly trail riding and palying around. The bike bogs and stalls when the rpms get low, but screams mid-top.....Iit has a pro-circuit pipe, not sure about the sprocket. I would like to be able to pull the front wheel in first without it being wide open...Now it doesnt feel like it wants to pull unless I rev the heck out of it.....Any advise or help is appreciated....