Full Kitaco 34mm big throttle body kit for Groms with big bore kits. 34mm throttle body, intak manifold tapers to 28mm on the intake port side to match common big valve heads. Handy fairing bracket also has mounts for oil coolers. Same big throttle body kit used on Kitaco Neo 181cc and 164cc kits. Programmable fuel controller is mandatory for using this product.