Boyesen’s revolutionary dual-stage reed design delivers more
usable power than stock. Your original one-stage reed operates most effectively only within a narrow RPM range. Boyesen’s one soft reed on top of one firm flow-through reed gives you a wide range of intake control, plus increased intake velocity. Your original reeds can’t possibly duplicate that performance.
- Dual stage reeds
- Minor change gives major H.P. improvements
- Faster opening and closing
- Greater low pressure (Low-throttle) response
- Greater velocity and flow area
- Longer overall life
- No engine damage if broken
- Carbon pro has new carbon fiber reed for quicker response
- Yamaha
1996 - YZ250
1995 - YZ250
1994 - YZ250
1993 - YZ250
1992 - YZ250
1991 - YZ250
1990 - YZ250WR
1990 - YZ250