Description
Features
- Laboratory flow analysis proves Boyesen® dual-stage reeds out-perform standard reeds
- They permit greater flow velocity over the entire range of operating pressures
- Increased performance from start-up to top acceleration
| Position | Notes | |||
|---|---|---|---|---|
| 1984-1988 | Yamaha | YZ250 | - | - |
| 1984-1990 | Yamaha | YZ490 | - | - |
| 1991, 1994, 1995, 1996 | Yamaha | WR 500 Z | - | - |
| 1992-1993 | Yamaha | WR500 | - | - |
