A month ago I raced a stock LTR450 on the rd. It did have a cherry bomb.But anyways we'd take off and I'd spin taking off in 2nd mind you for about 3-4 ft before it would hook up then it was all I could do to catch up cause he got a jump on me..Pissed me off.... Another buddy just got a new KFX450 and it's all stock..Racin him in a grassy field I still fuckin spin till 3rd gear but I can get right up to his rear tire before we gotta slow down... With your buddies mods I don't think you have a chance..You need to get ported, adv timing and get a head or get your stocker shaved...Then if you can hook up you'll have alot better chance of beating them. Just my .02 cents