I'm posting one more time.......My point is I have seen from my own eyes and experience a ds with just good bolt on out run a buddy of mine banshee with just pipes and lid off. His banshee on a dyno was 40 hp The ds put up 44hp and a lot more torque. They swapped riders a couple times and the ds still won. Now the banshee buddy is gettig a port job and a timing plate and some more basics. I will be willing to bet the banshee will beat it by a good bit. By the way you said inline 4's fire constantly. They don't They are offset and alot of them fire 2 at a time. Like stated above, there is alot more money in gp plus when is the last time you watched a real televised atv race on speed?????? They are not going to put alot of development into 4 stroke atvs. Do you realize that the r6 r1 gsxr and so forth are race ready from the floor for the most part??? No offence but get you some seat time and leave the keyboard or smart phone and go ride!!!! Nothing like experience. I am by no means experienced except I have watched the ds banshee thing. I own and operate an atv/utv repair business. BUT that don't make me GOD by no means, I come on here and ask people like dajr who have spent countless hrs on this type of stuff. As you can tell he don't talk shit he speaks experience. It is great that you are 15 and do this in your spare time instead of being out on a street corner. If you will"chill" and get some experience you have great capabilities.