Improve throttle response and engine performance with Boyesen 630 Dual-Stage Motorcycle Reeds. Designed as a performance replacement for select two-stroke applications, these reeds use a dual-stage design to provide faster opening and closing, greater airflow, and improved low-pressure response. The result is stronger performance through the low-throttle range, increased velocity, and a greater effective flow area compared with conventional reed designs.
The Boyesen 630 reed assembly is engineered to deliver a meaningful horsepower improvement with a minor component change. Its dual-stage construction supports responsive operation across the powerband while helping promote longer overall service life. The design also provides added protection in the event of reed breakage, helping prevent engine damage caused by broken reed material entering the engine.
Boyesen part number 630 is designed to fit select Kawasaki and Yamaha two-stroke motorcycles and ATVs, including the 1986 Kawasaki KX80, 1987 Kawasaki KX80, 1987 through 1992 Yamaha YZ80, and 1988 through 1989 Yamaha YFS200 Blaster. Verify the model year and application before installation to ensure proper fitment. This product is manufactured by Boyesen and is also identified by vendor part number 630.
Features:
- Dual-stage reed design for improved engine response
- Minor component change helps produce major horsepower improvements
- Faster opening and closing for responsive operation
- Improved low-pressure and low-throttle response
- Greater intake velocity
- Increased flow area
- Longer overall service life
- Reed design helps prevent engine damage if breakage occurs
- Fits select 1986-1992 Kawasaki KX80 and Yamaha YZ80 applications
- Fits select 1988-1989 Yamaha YFS200 Blaster applications
- Brand: Boyesen
- Manufacturer part number: 630
- Vendor part number: 630
Fitment:
1986 Kawasaki KX80
1987 Kawasaki KX80
1987 Yamaha YZ80
1988 Yamaha YFS200 Blaster
1988 Yamaha YZ80
1989 Yamaha YFS200 Blaster
1989 Yamaha YZ80
1990 Yamaha YFS200 Blaster
1990 Yamaha YZ80
1991 Yamaha YFS200 Blaster
1991 Yamaha YZ80
1992 Yamaha YFS200 Blaster
1992 Yamaha YZ80
1993 Yamaha YFS200 Blaster
1994 Yamaha YFS200 Blaster
1995 Yamaha YFS200 Blaster
1996 Yamaha YFS200 Blaster
1997 Yamaha YFS200 Blaster
1998 Yamaha YFS200 Blaster
1999 Yamaha YFS200 Blaster
2000 Yamaha YFS200 Blaster
2001 Yamaha YFS200 Blaster
2002 Yamaha YFS200 Blaster
2003 Yamaha YFS200 Blaster
2004 Yamaha YFS200 Blaster
2005 Yamaha YFS200 Blaster
2006 Yamaha YFS200 Blaster