for more bottom end power there are a few things you can do. Bore out your motor to .25 or .50. install aftermarket v-force reeds. of course youd have to rejet your carb becuase of the over size piston. Id leave the stock pipe on. after market exhaust is good for better top end or mid range. Next id gear down on the front and go up on the back. try one done on front and 2 up op on the rear. remember that gear down for better low end will take away what you had on the top end. hope this helps.
