SSP-G QMB139 50cc Performance Clutch Set

High Performance Clutch Assembly w/ Ventilated Clutch Bell for QMB139 50cc, 4-stroke engines.Includes 1500RPM torque spring and 1000RPM clutch springs. Please see our Warranty & Returns Policy. Clutch Bell Inner Diameter: 107mm Clutch Bell Outer Diameter: 115mmClutch Inner Diameter: 12mm Uses 6901 RS bearing Number of Splines (clutch bell): 22 Splined Inner Diameter (peak to peak): 11mm Splined Inner Diameter (valley to valley): 12mm1500 RPM Torque Spring1000 RPM Clutch Springs Made in Taiwan