Anyone ever run 25" tires on a Z400/KFX400 or other similar sportbike? It looks like they'll fit if I lose my heelguards. I can get 25's for the same price as 22's, and can use all the clearence I can get. I ride trails and mud pits with some jumping and hill climbing. I would change out my front and rear sprockets to accomodate for the larger tires.