VALVE SPRING SET YZF250 01-12, KIBBLEWHITE 80-80069 RACING, WRF250 01-12 YAMAHA

YAMAHA
YZF/WRF 250 2001-2012,

Lightweight Racing Valve Chrome Silicon Springs.
Kibblewhite # 80-80069. 

HIGH LIFT 0.380 INC.
KPMI takes a scientific -System- approach when designing our Valve spring kits. Each component is designed to work with the others as part of the complete system. KPMI?s engineers use our proprietary design and simulation softwares, and draw on our 70+ years of design experience to create these systems. Our design, simulation, and manufacturing processes insure compatibility of the valve spring?s force and natural frequency with the cam profile, valvetrain mass, system harmonics 65-722 46# Seat Pressure / 155 lb. at .450 lift
Exhaust - 0.450 Valve Lift OK 46# Seat Pressure / 155 lb. at .450 lift
KPMI takes a scientific -System- approach when designing our Valve spring kits. Each component is designed to work with the others as part of the complete system. KPMI?s engineers use our proprietary design and simulation softwares, and

Part No. 65-721.SP (Off Road Only Ltd.)