Motion Pro Titan Throttle Sleeve for CRF250/450R/X (2002-2013)Designed for the rigorous demands of motocross. Features: Tougher and more resilient than aluminium tubes. Will not deform and seize upon a hard impact like aluminum tubes can. Proprietary low friction material provides smooth operation and eliminates galling. No irritating and uncomfortable vibration like aluminium tubes. Higher performance than aluminium tubes at a much lower cost. The Titan throttle tube has a non removable end cap. Modification of