Dr. Pulley Zuma 50cc Hit Clutch Bodyworks Tuning the Contra Spring or

Tuning the Contra Spring or sometimes referred to as a Torque Spring is very important in a modified two-stroke engine

This can be used on a stock bore or a big bore

1 for an 86kg or less rider and 1 for an 86kg or heavier rider

measuring in at 25

More flow of oil is required and get you the best results in performance

Dr. Pulley Zuma 50cc Hit Clutch Bodyworks Tuning the Contra Spring orThe Dr. Pulley Zuma Clutch enables high contact pressure not only through centrifugal force but using a double wedge system. The package includes the regular clutch springs and newly designed pillow springs which will give you more power to the ground. The stronger your engine the more response the Dr. Pulley clutch will achieve. Most clutches can give you a fast take off out of the hole but will start to slip at higher revs. However, the Dr. Pulley