What is the z-Start Clutch? Rekluse developed the z-Start Clutch to revolutionize the clutch industry. The z-Start Clutch is the ultimate performance product for every rider. The z-Start Clutch eliminates stalling and puts more power to the ground in the most demanding situations. Whether you’re a new trail rider or a pro motocross competitor, you can benefit from the latest in race proven clutch technology. The z-Start Clutch is easy to install as it simply replaces your stock pressure plate with no special modifications. The z-Start Clutch automatically disengages the engine at idle speed. As throttle is applied, centrifugal forces engage the clutch providing perfect clutch feathering control as the throttle is applied. The z-Start Clutch will eliminate stalling, reduce arm-pump, increase corner speed, improve traction and tire life, get quicker starts and retain the stock clutch lever to fully override the z-Start clutch giving the rider the control of a stock clutch operated bike.