- Clutch springs for Max Torque Clutch.
 - Excellent tool to adjust engagement RPM and therefore the performance of the Max Torque Clutch on your go kart.
 - Available in a variety of colors, and engagement speeds:
 - Black (2900 RPM engagement)
 - Green (2500 RPM engagement)
 - Standard (2200 RPM engagement)
 - Blue (1800 RPM engagement)
 - Yellow (1500 RPM engagement)