I just got a banshee and wanted to put a 7mm stroke with cylinder, pistons, custom billet head, and 7mm forged crank in it and a some V-Force and a K&N filter kit with pre-filters, would that be fast enough to bet a yfz450 bored out to a 470 and has a airbox eliminator on it with a lrd full system and timing mod and ported and polished and a -6 flywheel. "IN A FLAT OUT DRAG RACE"

 

i think it would be close....it would probably come down to riding abilities...

 

with the mods you listed for a shee with port and polish, and the right person doing the motor work, if your a good rider you will do just fine