Upgrade the intake performance of your motorcycle with Boyesen 642 Dual-Stage Reeds. Designed for responsive two-stroke engines, these reed petals help improve airflow, throttle response, and overall engine performance without requiring extensive modifications. The dual-stage design supports efficient operation across a broad range of engine speeds, making this a practical performance upgrade for motocross and off-road applications.
Boyesen 642 reeds feature faster opening and closing action, greater low-pressure response, and increased velocity through the intake tract. These characteristics can help improve low-throttle behavior while supporting greater flow area at higher engine speeds. The reeds are engineered for long overall service life, and their durable construction is designed to help prevent engine damage if a reed breaks.
Fitment: The Boyesen 642 Dual-Stage Reeds fit 1994–1998 Kawasaki KX125 models and 1990–1994 Suzuki RM125 models. Verify the motorcycle model year and existing reed-cage configuration before installation. Manufacturer part number: 642. Vendor part number: 59-7642.
Features:
- Dual-stage reed design supports improved airflow and engine response
- Minor intake modification can deliver significant horsepower improvements
- Faster reed opening and closing for responsive engine operation
- Improved low-pressure response for stronger low-throttle performance
- Greater intake velocity and flow area
- Durable construction provides longer overall service life
- Designed to help prevent engine damage if a reed breaks
- Fits 1994–1998 Kawasaki KX125 and 1990–1994 Suzuki RM125 models
Fitment:
1990 Suzuki RM125
1991 Suzuki RM125
1992 Suzuki RM125
1993 Suzuki RM125
1994 Kawasaki KX125
1994 Suzuki RM125
1994 Yamaha YZ125
1995 Kawasaki KX125
1995 Suzuki RM125
1995 Yamaha YZ125
1996 Kawasaki KX125
1996 Suzuki RM125
1996 Yamaha YZ125
1997 Kawasaki KX125
1997 Suzuki RM125
1997 Yamaha YZ125
1998 Kawasaki KX125
1998 Suzuki RM125
1998 Yamaha YZ125
1999 Yamaha YZ125