DESCRIPTION: High Performance Adjustable Clutch Set with a Ventilated Clutch Bell for QMB139 50cc, 4-stroke engines. Pillow spring loads can be adjusted by using the lock-in positions. Under the clutch shoes screws are attached to function as adjustable inertia weights. (Please note: no other part of the clutch is adjustable.) Clutch Bell Inner Diameter: 107mm Clutch Bell Outer Diameter: 115mm Clutch 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): 12mm 1500 RPM Torque Spring 1000 RPM Pillow Springs Made in Taiwan Baja SC50, Baja SC50-P, Genuine Buddy 50, Genuine Roughhouse 50, Kymco, Panterra, QMB139 50cc/49cc , Qingqi QM50QT-6V, Roketa, Schwinn Laguna 50, Tank
NOTE: no other part of the clutch is adjustable.) Clutch Bell Inner Diameter: 107mm Clutch Bell Outer Diameter: 115mm Clutch 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): 12mm 1500 RPM Torque Spring 1000 RPM Pillow Springs Made in Taiwan Baja SC50, Baja SC50-P, Genuine Buddy 50, Genuine Roughhouse 50, Kymco, Panterra, QMB139 50cc/49cc , Qingqi QM50QT-6V, Roketa, Schwinn Laguna 50, Tank