go for the trx450r, alot better then a kfx400. and i wasn't trying to be negative it's just you never mentioned needing a case to any of us. and if you wanna get the yfz back come meet me and i'll trade you my blasty, my quadrunner 300, and a dirt-bike for it haha i really liked your yfz but a trx is very good too. only reason alot of people rag on a trx is because they come from the factory with about nothing for a track, honda planned on people modding them so they left it. you can leave it thin the way it is for trails or widen it for a track. and i hope you get the trx so i can see what all you do to it I:I