Engine

Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs Compatible with boosted or turbocharged applications CNC-machined titanium retainers and Cr-Si dual springs provide valvetrain control at high...

600" max lift kits are designed for maximum performance Feature interference-wound, double-chrome silicone springs; heat-treated steel base washers Include steel retainers Made in the U.S.A.. SPRING KT 84-04 BT .655TI

Kit contains all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models Cylinder Head Service Kits include the below components: Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive or...

Progressively wound springs using Kobe super-clean, chrome silicon-based wire that is heat treated and shot peened Tight-tolerance, FEA-designed hardened steel Posi-LocÖ style upper retainers to ensure correct assembly height and resist keeper "pull...

Kits include KPMI« or equivalent valve spring kit, a full set of Black DiamondÖstainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special...

Black Diamond? valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond? valves feature one-piece construction and hard chrome stems Spring sets...

Spring kit contains springs and titanium upper collars; lower collars included as required; spring kits are engineered for use with standard and oversized valves Spring kit comes complete for one motor Keepers are not included Made in the U.S.A.. YZ250F...

Progressively wound springs using Kobe super-clean, chrome silicon-based wire that is heat treated and shot peened Tight-tolerance, FEA-designed hardened steel Posi-LocÖ style upper retainers to ensure correct assembly height and resist keeper "pull...

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond intake valves Extends the life of the valvetrain and intake components by as much as 4x over the OEM titanium parts Includes...

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond intake valves Extends the life of the valvetrain and intake components by as much as 4x over the OEM titanium parts Includes...

Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs Compatible with boosted or turbocharged applications CNC-machined titanium retainers and Cr-Si dual springs provide valvetrain control at high...

Kits include KPMI« or equivalent valve spring kit, a full set of Black DiamondÖstainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special...