Top End

All pistons are heat-treated with a T-5 hardening and tempering cycleAll piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeForged pistons are forged from 2618 aluminum for superior...

The foremost compatible top-end rebuild kit all in one boxFeature a Moly2000 centrifugally-spun, cast cylinder sleeved iron bore to provide better ring seal for better compression, more torque and more horsepower2-stroke kit comes complete with...

The foremost compatible top-end rebuild kit all in one boxFeature a Moly2000 centrifugally-spun, cast cylinder sleeved iron bore to provide better ring seal for better compression, more torque and more horsepower2-stroke kit comes complete with...

The foremost compatible top-end rebuild kit all in one boxFeature a Moly2000 centrifugally-spun, cast cylinder sleeved iron bore to provide better ring seal for better compression, more torque and more horsepower2-stroke kit comes complete with...

2-stoke pistons include piston, rings, pin and clipsPiston made with high quality, permanent skirt coating to reduce friction and piston rock for quiet and improved performance4032 T6 Forged Aluminum AlloyGerman Engineered from Wossner?s own designs and...

Top End Piston Kit - 94.96 Mm - Yamaha Vtktc23551B Yamaha -- YFZ 450 LE 4x2 -- (2004); Yamaha -- YFZ 450 SE 4x2 -- (2006, 2007, 2008); Yamaha -- YFZ 450 Bill Balance Edition 4x2 -- (2006, 2007); Yamaha -- YFZ 450 4x2 -- (2006, 2004, 2009, 2013, 2008,...

Top End Piston Kit - 95.96 Mm - Honda Crf450R Vtktc22900B Honda -- CRF450R -- (2006, 2004, 2005, 2002, 2003)

All components made in the U.S.A. Kawasaki -- Ninja ZX-10R -- (2010, 2008, 2009)

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...

All pistons are heat treated with a T-5 hardening and tempering cycleAll piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeCast piston kits are gravity cast aluminum alloy (not...

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

Top End Piston Kit - 87.96 Mm - Husqvarna | Ktm Vtktc23641A KTM -- 350 SX-F -- (2012, 2011); KTM -- 350 XC-F -- (2012, 2011); KTM -- 350 EXC-F -- (2013, 2015, 2014, 2012, 2016); KTM -- 350 XCF-W -- (2013, 2015, 2014, 2012, 2016); Husqvarna -- FE 350 --...