Boyesen 686 Power Reed For: KTM 250 (all models) 1999-2001; KTM 250 EXC 2002-2003; KTM 300 (all models) 1999-2003; KTM 380 (all models) 1999-2002 Power reeds use a patented dual stage fiberglass design for more air flow, more air velocity and more power The top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMs; the stiffer, bottom reed is ported to provide maximum flow and horsepower at higher RPMs Longer overall life: Boyesen power reeds outlast all other aftermarket reed petals Minor change gives major horsepower improvements and fuel economy