The Premier Diaphragm Type Clutch Springs (PBCSK905) are OEM-quality replacement clutch springs for modern motorcycles that use a diaphragm (also called a slipper or Belleville) spring rather than the traditional coil spring arrangement. Diaphragm clutch springs are increasingly common on larger-capacity road and sport bikes where precise, consistent clutch actuation force and anti-snatching properties are important.

Clutch springs fatigue over time — especially under aggressive use or racing conditions — leading to reduced clamping force, clutch slip under hard acceleration, and inconsistent engagement. Premier's diaphragm springs are engineered to factory specifications, restoring the correct clamping load and feel.

Key Features

• Replacement diaphragm-type clutch spring — as used on many larger modern bikes
• Engineered to OEM specifications for correct clamping force
• Restores positive, consistent clutch engagement
• Compatible with bikes spec'd with diaphragm clutch spring arrangement
• Premier quality — trusted by Australian and New Zealand riders for decades

Signs Your Clutch Spring Needs Replacing

• Clutch slipping under hard acceleration
• Light or inconsistent clutch lever pressure
• Difficulty holding gears smoothly under load

SKU: PBCSK905. Please confirm diaphragm spring fitment for your specific make and model before ordering.