This is a BRAND NEW nut for a Yamaha Banshee from Vito's Performance This is what holds the flywheel to the engine (crankshaft) fits year Yamaha Banshee 350, Blaster 200, or YFZ450 carb or EFI models also fits Yamaha YZ450F, WR250F, WR250R, YFZ450R, YZ250F, MINT SHAPE, brand new, ready to use! Re