My 700 mudpro has no chance at all beating my buddies can am 800 so i figured my raptor should get him. This is what happened at first all i had was stock sprockets and alba exhaust and he got the whole shot and i barely got him at the end after a mile approx but we usually don't race that long so i loose most races. So i installed dyno jet kit, k&n filter with billet adapter and removed lid. And i installed a 42 tooth rear sprocket. Do u think the sprocket will help me, i don't need all that top end i just want to be quicker. Has any one tried aftermarket rev boxes?