Note: This is a specialty product and is not currently available for purchase online. Please call Duncan Racing International and a DRI staff member will assist you by collecting the required specifications and placing your order. Thank you.

HD Valve Springs must be used in combination with all DRI camshafts.

Valve Springs are sold in sets.

INSTALLATION NOTES:
All valve springs require professional installation.
Valve seats must be checked.
Guide seals should be checked.

Honda 250X/300EX
30-3041 HD Valve Springs (4-Valve) w/Titanium Tops $199.95

Honda 400EX
KW-3111 HD Valve Springs w/Titanium Tops. $195.00

Honda TRX 450
VS-K720 HD Valve Springs w/Titanium Retainers 2004-05 $249.00

VS-K640 HD Valve Springs w/Titanium Retainers
2006-09 $239.00

Suzuki LTZ/Kawasaki KFX400
60-6045 HD Valve Springs w/Titanium Tops $225.00

Suzuki LTR450
VS-60280 HD Valve Springs w/Titanium Tops $249.95

Yamaha YFZ450 (04-09)
80-80206 HD Valve Springs w/Titanium Retainers $299.50

Yamaha Raptor 660
80-80030 HD Valve Springs w/Titanium Tops $299.00

Yamaha Raptor 700
80-80410 HD Valve Springs w/Titanium Tops $249.00

Yamaha Warrior 350/Wolverine/Raptor 350
VS-8000 HD Valve Springs w/Titanium Tops $135.00

Yamaha Raptor 250
VS-80550 HD Valve Springs w/Titanium Retainers $119.95