The New Kabuto R21 engine has undergone a detailed review and evolution. While maintaining the smooth and easy-to-use characteristics of the previous Kabuto R21 engine, the improved crankshaft delivers more torque in the mid- and low-speed range along with better idling performance, resulting in stable and easy-to-use performance even during long race races. The lightweight outer head, with its superior cooling performance, features a special graphic design.