Dr. Pulley QMB139 Variator Kit

Dr. Pulley Performance Variator Assembly V 161300 for 50cc 4-stroke QMB139 engines. Specially Designed Ramp Shape Extended Ramp Length Adjustable Boss Length Racing Type Ramp Plate Includes Instructions Includes Rear Plate Sliders Does Not Include Roller or Slider Weights Drive Face Outer Diameter (A): 89mm Boss Inner Diameter (C): 14mm Boss Outer Diameter (B): 20mm Ramp Plate Inner Diameter (D): 14mm Starter Drive Plate Inner Diameter Peak to Peak (H): 13mm Starter Drive Plate Outer Diameter Valley to Valley (G): 14mm