1990-1996 Yamaha YZ250, 1990 YZ250WR Power Reeds Boyesen 644

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1-Day Handling
Calculated at Checkout

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