I am told...Hot Rods 4mil stroker 5mil long rod crank with Hot Rods pistons, noss cool head w/21cc stroker domes, cylinders have a mild port job. V Force 2 reeds, 28mm PWK carbs, DG Nerf Bars, DG Full Skid Plate, DG pipes, Durablue axle, newer YFZ450 tires and wheels, dual carb mounted air filters