Top End

All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistanceMade in the U.S.A. Polaris -- Predator 500 4x2 -- (2003, 2005, 2006, 2004, 2007);...

Kibblewhite Spring Kit 82-82012 Polaris -- Predator 500 4x2 -- (2005, 2006, 2003, 2004, 2007); Polaris -- Predator 500 50th Anniversary Edition -- (2004, 2003, 2005, 2006, 2007); Polaris -- Predator 500 Troy Lee Edition -- (2005, 2007, 2003, 2004, 2006);...

Kibblewhite Top End Service Kit 80-82750 Yamaha -- YFZ 450R 4x2 -- (2017, 2019, 2012, 2015, 2010, 2014, 2018, 2009, 2020, 2011, 2013, 2016)

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

Kit includes 2 intake Viton? seals and 2 exhaust Viton? seals Yamaha -- YZ 250 F -- (2020, 2019)

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Black Diamond? valves are CNC machined from one-piece forgings of EV8 Stainless SteelBlack Diamond? proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wearMade in the U.S.A. Yamaha -- YZ 250 F -- (2020,...

Spring kits contain springs and titanium upper collars; lower collars included as required; spring kits are engineered for use with standard and oversized valvesSpring kits come complete for one motorKeepers are not includedMade in the U.S.A. Yamaha --...

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