CHANGE THE GEAR RATIO ON YOU MOTOR FOR MORE PERFORMANCE
NCY GEARS SET 15*37 IS LONGER BY 20% FROM THE STOCK (13/40 TEETH) WHICH WILL PROVIDE HIGHER TOP END SPEED WITHOUT LOSING POWER ON ACCELERATION. COMPARE TO STOCK GY6 125/150CC+ TRANSMISSION GEAR RATIO SET IS 13X40 THIS UPGEAR SET IS 15X37 = 2.46:1. GET THE MOST OUT OF YOUR BIG BORE KIT, WITH INCREASED TOP SPEED AND A MORE USABLE REV RANGE PERFORMANCE.