Upgrade throttle response and engine performance with Boyesen 633 Dual-Stage Motorcycle Reeds. Designed as a direct-fit replacement reed system, these reeds use a dual-stage configuration to improve airflow characteristics throughout the power range. The design helps provide quicker reed opening and closing, greater low-pressure response, and increased velocity for improved rideability and engine performance.
Boyesen 633 reeds are engineered for extended service life and increased flow area compared with conventional reed designs. Their construction also helps protect the engine in the event of reed breakage, reducing the risk of internal engine damage. This makes them a practical performance upgrade for riders seeking sharper throttle response and dependable operation.
These Boyesen reeds fit select Honda applications, including the 1990 Honda FL400R Pilot and Honda CR250R models from 1988 through 1995. Verify the year, model, and existing intake or reed cage configuration before installation. The manufacturer part number is 633, and the vendor part number is 59-7633.
Features:
- Dual-stage reed design improves airflow across the engine's operating range
- Faster opening and closing enhances throttle response
- Improves low-pressure, low-throttle engine response
- Increases air velocity and available flow area
- Minor installation change can provide significant horsepower improvements
- Extended service life for dependable performance
- Designed to help prevent engine damage if a reed breaks
- Fits the 1990 Honda FL400R Pilot and 1988-1995 Honda CR250R
Fitment:
1988 Honda CR250R
1989 Honda CR250R
1990 Honda CR250R
1990 Honda Fl400R Pilot
1991 Honda CR250R
1992 Honda CR250R
1993 Honda CR250R
1994 Honda CR250R
1995 Honda CR250R
1996 Honda CR250R
1997 Honda CR250R
1997 Kawasaki KX250
1998 Honda CR250R
1999 Husqvarna CR250
1999 Husqvarna WR 250
2000 Husqvarna CR250
2000 Husqvarna WR 250
2001 Husqvarna CR250
2001 Husqvarna WR 250
2002 Husqvarna CR250
2002 Husqvarna WR 250
2003 Husqvarna CR250
2003 Husqvarna WR 250
2004 Husqvarna CR250
2004 Husqvarna WR 250
2005 Husqvarna CR250
2005 Husqvarna WR 250