712122 Replacement Parts Diaphragm Spring for Zpn 712106 712121 712

This Tak's Performance Parts diaphragm spring is designed for use with Variable Pressure Clutch systems. Rated at 150 lbs, this loose-style spring works in conjunction with centrifugal bob weights to manage clutch engagement. At idle and low RPMs, it provides a significantly lighter lever pull, reducing hand fatigue during gear shifts. As engine speed increases, the VPC system applies additional pressure, ensuring a firm lock-up that exceeds standard performance springs. It improves overall clutch feel and makes finding neutral easier. This component is essential for riders looking to balance a manageable clutch pull with the clamping force required for performance Harley-Davidson builds.