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Dr. Pulley QMB139 Variator Kit
- 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
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