I know the two stroke guys are running heavier flywheels when you go to the dunes but will it help on a four stroke on hills? im thinking it will but who knows? basicly what im trying to do is be able to race people up the main hill where i go and be able to do it in fourth gear currently i do but it kinda lugs at the top so it doesnt matter if i am in third or fourth. According to the radar gun it was 48mph in fourth and 47mph in third at the top . Im thinking the wieght should help me carry the momentum all the way up the hill. I am running an 03 450 with 13/48 gearing i could go down more in gearing but then i will just loose mor top end right.I am trying to smoke 2 smoke 500's currently i pull on them but thats not enough for my satisfaction.