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 | |||
|---|---|---|---|---|
| 1978, 1979, 1980, 1981, 1982, 1989 | Yamaha | YZ250 | - | - |
| 1977-1983 | Yamaha | IT250 | - | - |
| 1980, 1983 | Yamaha | IT 465 | - | - |
| 1981, 1982, 1985 | Yamaha | IT 490 | - | - |
| 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 | Yamaha | YZ 465 | - | - |
| 1981-1982 | Yamaha | IT465 | - | - |
| 1983-1984 | Yamaha | IT490 | - | - |
| 1980 | Yamaha | IT425 | - | - |
| 1980-1981 | Yamaha | YZ465 | - | - |
| 1982-1983 | Yamaha | YZ490 | - | - |
| 1975, 1976, 1984, 1985, 1986 | Yamaha | IT 250 | - | - |
| 1979 | Yamaha | YZ400 | - | - |
| 1979 | Yamaha | IT400 | - | - |
| 1989 | Yamaha | WR 250 | - | - |
