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BOYESEN 665 dual-stage motorcycle reeds are designed for improved throttle response and airflow in compatible KTM 65 SX applications. The reed design provides faster opening and closing, greater low-pressure response at low throttle, and increased velocity and flow area.
This BOYESEN reed set fits the 1998–2007 KTM 65 SX. The manufacturer part number is 665, and the vendor part number is 665. A minor change to the reed system can provide major horsepower improvements while supporting longer overall service life. The reeds are also designed so that engine damage does not occur if a reed breaks.
Features:
- Dual-stage reeds
- Faster opening and closing
- Greater low-pressure response at low throttle
- Greater velocity and flow area
- Designed to support major horsepower improvements
- Longer overall life
- No engine damage if a reed breaks
- Fitment: 1998–2007 KTM 65 SX
- Manufacturer part number: 665
- Vendor part number: 665
Fitment:
1998 KTM 65 SX
1999 KTM 65 SX
2000 KTM 65 SX
2001 KTM 50 SX Pro Jr LC
2001 KTM 50 SX Pro Sr LC
2001 KTM 65 SX
2002 KTM 50 SX Pro Jr LC
2002 KTM 50 SX Pro Sr LC
2002 KTM 65 SX
2003 KTM 50 SX Pro Jr LC
2003 KTM 50 SX Pro Sr LC
2003 KTM 65 SX
2004 KTM 50 SX Pro Jr LC
2004 KTM 50 SX Pro Sr LC
2004 KTM 65 SX
2005 KTM 50 SX Pro Jr LC
2005 KTM 50 SX Pro Sr LC
2005 KTM 65 SX
2006 KTM 50 SX Pro Jr LC
2006 KTM 50 SX Pro Sr LC
2006 KTM 65 SX
2007 KTM 50 SX Pro Jr LC
2007 KTM 65 SX
2008 KTM 50 SX Pro Jr LC
2008 KTM 65 SX
2008 KTM 65 XC