We developed a brand-new throttle kit called "EVO throttle kit" aiming for race bikes. By having requests from racing teams such as improving the throttle twisting and the maintenance accessibility, we made a completely brand new design throttle kit. This is the high-performance throttle kit which eliminates various frictional resistance of throttle action. Although it was born from different concept from our conventional throttle kits that evolved from stree customization, it is also a recommended item for street riding.