AFAM Chain Kit 520MR2 13 48 Standard Ultra Light Rear Sprocket Slide the new throttle tube Slide the new throttle tube on the handlebar and lube using a penetrating lubricant preferably Maxima MPPL (do not use grease as this attracts dirt and makes the throttle stick after a short period of time) This model fits on the Kawasaki KX250 and KX500 only