Give your ZX-12R the clutch strength it deserves. Brock’s Heavy Duty Clutch Spring Kit is built from valve-spring-quality steel, then shot-peened and stress-relieved to withstand the extreme heat and abuse of high-power drag-style launches. Unlike standard industry springs, ours are engineered to deliver millions of trouble-free, sag-free cycles for consistent performance pass after pass.
By increasing spring pressure by approximately 25%, this kit helps extend clutch life, eliminate “spongy” lever feel, and put more of your bike’s power to the ground-translating to better ETs and more MPH.
FEATURES
- Includes 6 heavy-duty springs
- Extends clutch life and improves MPH under load
- Firmer, more consistent lever feel—no more sponginess
- Precision-manufactured from valve-spring quality steel
- Shot-peened and stress-relieved for maximum durability
- Engineered for millions of trouble-free cycles
- Increases lever pressure by approximately 25%
PRO TIP
- Everyday Riding: Run 3 heavy duty + 3 OEM springs
- Drag Racing: For maximum performance at the track, install all 6 heavy-duty springs.
