Description
Features
- Stage 1 is designed for low end torque
- Adds a 5%-10% power gain
- Designed and dyno proven in the USA
- Manufactured by utilizing state of the art valvetrain software
- CNC machined from 8620 billet, case-hardened steel for an exact fit and lobe profile
| Position | Notes | |||
|---|---|---|---|---|
| 1998-2000 | Yamaha | WR400F | - | - |
| 2001-2002 | Yamaha | WR426F | - | - |
| 2000-2002 | Yamaha | YZ426F | - | - |
| 1998-1999 | Yamaha | YZ400F | - | - |
