Honda upgraded valve springs for OEM cylinder head. When running OEM or aftermarket camshafts this will provide a safe increase for RPM limit.
Key Features:
- HD Valve spring kit will support RPM up to 12,000RPM, unlocking an additional 20% more overrev over the stock RPM limit
- Allows a shorter gearing setup to really help get out of the idle-3,000rpm range where the semi auto clutch is engaging
- More top speed in every gear
- Highly recommended to be used with larger diameter exhaust
Note: Use only 1 intake and 1 exhaust spring, OEM springs are removed completely.
