DR PULLEY HIT CLUTCH

Dr. Pulley HiT Clutch

• The HiT clutch (High‑Thrust) is a performance clutch designed for CVT (automatic) scooters / small vehicles. 

• It uses a dual-spring system:

  1. A clutch spring (centrifugal) that controls when the clutch initially engages. 

  2. A pillow (torque) spring plus a push-pin / wedge mechanism that gives extra “thrust” once RPM is high enough, to lock the clutch arms more firmly into the bell.

  3. This system means the clutch doesn’t just rely on centrifugal force; it also uses engine torque to generate more grip pressure. 
     

Performance / Advantages

• Stronger Clutch Engagement: Because of the second “thrust” mechanism, the clutch can grip the bell more firmly, reducing slippage under load. 

• Improved Throttle Response: Engagement is more solid and quick, so acceleration feels sharper. Better for Climbing / Overtaking: With higher grip, it’s good when going uphill or when you need to accelerate hard. 

• Tunable: Comes with multiple sets of springs (both clutch springs and pillow springs), so you can tune when exactly the “thrust” mechanism kicks in by changing pillow spring stiffness. 

• Better Efficiency & Less Heat: Because slippage is reduced, there’s less wasted energy and less heat buildup.