Pro Circuit Clutch Springs for Honda CRF450R (CSH21450-CS)

Upgrade clutch performance with Pro Circuit CSH21450-CS Clutch Springs, designed for Honda CRF450R applications. These heavy-duty replacement springs are engineered to provide 12–15% greater stiffness than stock springs, helping deliver more positive clutch engagement and improved control during aggressive riding, racing, and demanding acceleration.
The increased spring rate helps prevent clutch slipping by maintaining consistent pressure through the clutch pack. This allows more of the engine’s power to reach the rear wheel while giving riders a more predictable clutch feel. Pro Circuit’s clutch spring design supports dependable performance across repeated starts, gear changes, and high-load riding conditions.
Consistent spring performance also helps riders control how efficiently the clutch turns engine power into acceleration. The result is a responsive clutch system with improved engagement characteristics and reliable operation. The Pro Circuit CSH21450-CS Clutch Springs are a practical choice for riders seeking stronger clutch performance without changing the overall clutch system.
Feature: 12–15% stiffer than stock clutch springs
Feature: Provides more positive clutch engagement
Feature: Helps prevent clutch slipping under load
Feature: Delivers consistent spring performance
Feature: Improves control over power transfer and acceleration

Features:

• 12–15% stiffer than stock clutch springs

• Provides more positive clutch engagement

• Helps prevent clutch slipping under load

• Delivers consistent spring performance

• Improves control over power transfer and acceleration

Ships from Parts Unlimited.