RadiusX Clutch Kit. RadiusX combines the best of both worlds, adding Rekluse's thin friction TorqDrive® technology to their flagship automatic EXP disk, all within an O.E.M. clutch footprint. With RadiusX, Rekluse has created a high-performing automatic clutch at a mid-range price point for riders on the trail or track. Championship-Proven TorqDrive®: Increased performance and durability. Responsive throttle, feels like the throttle is connected to the rear wheel. Snappier, stronger engagement / feel. Increased torque capacity empowers the rider to use the motor's full potential. Reduced clutch fade. Flagship EXP Technology: Take off and stop in gear without using clutch lever - prevents engine stalls. Smooth engagement. Manual clutch use is retained. Have more fun with less energy and less fatigue.