Motorcycle Clutch Assembly Drum Hub & Housing Gear For Benelli TRK502 TRK502X Leoncino 500 502C Engine Parts complete clutch drum hub housing gear set compatible with Benelli TRK502 TRK502X TRK502C Leoncino 500 engine mounting gear tooth specifications machined gear teeth ensure smooth power transmission reduce abnormal vibration gear jumping during shifting construction friction wear torque load from off road highway riding accurate spline design fits clutch plates eliminate slipping hard shift power loss issues direct bolt on installation no extra machining required for full clutch system overhaul engine repair