The ProTaper Micro Throttle Tube kit is designed to work exclusively with the ProTaper Micro Handlebar. The downsized design is purpose built to give youth riders a reduced hand-hold area to grasp while riding and racing. By reducing the hand-hold area, youth riders can now grasp the throttle the same way an adult rider grasps a traditionally-sized throttle; resulting in more rider control and drastically reduced hand fatigue. Utilizing a two-piece design, the Micro Throttle Tube can be fitted to any 2-stroke model off-road bike of 85 cc and smaller by using one of the seven optional throttle cams. Throttle tube barrel made using T6 aluminum alloy. Anodized and knurled barrel to resist corrosion and ensure maximum grip traction. Seven optional injection-molded, high-impact plastic cams.