i raced a freind with an 800 rev x renegade and he has piped,pistons,head,clutching..etc...that was dyno tuned to almost 165hp. he has a 1.75 track.he outweighs me by about 100lbs...here how it went...dead even out of the hole and by the end of the 1/4 i had him by 8 lengths my freinds say..i am very impressed with my xf7