- Laboratory flow analysis proves Boyesen dual-stage reeds outperform standard reeds
- They permit greater flow velocity over the entire range of operating pressures
- Increased performance from start-up to top acceleration
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1999-2000 | Yamaha | Phazer 500 PZ500 | |
| 1993-1995 | Yamaha | Phazer II LE PZ480E | |
| 1996 | Yamaha | Phazer II LE PZ480E Electric | |
| 1993-1995 | Yamaha | Phazer II ST PZ480ST | |
| 1996-1999 | Yamaha | Phazer Mountain Lite PZ480ST | |
| 1984-1989 | Yamaha | Phazer PZ480 | |
| 1984-1991 | Yamaha | SRV SR540 | |
| 1996-1998 | Yamaha | Venture TR VT480TR | |
| 1996-1997 | Yamaha | Venture XL VT480 | |