Dirt Bike Engine
4752 parts
Pistons, top-end kits, gaskets, cylinders, valves, bearings and seals from Vertex, ProX, Wossner, Athena, Cometic, WSM, Boyesen and Moose Offroad. Everything you need for a fresh top end, a full rebuild or a little more power. Shop all dirt bike parts.
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Kibblewhite - 60-60516T - Valve - Exhaust - 25.00 mm - Suzuki
Kibblewhite
$109.33Kibblewhite - 09262759 - Valve - Exhaust - 25.00 mm - SuzukiFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$109.33 -
Kibblewhite - 80-80217T - Valve - Exhaust - 28.00 mm - Yamaha
Kibblewhite
$92.51Kibblewhite - 09262767 - Valve - Exhaust - 28.00 mm - YamahaFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$92.51 -
Kibblewhite - 60-60512T - Valve - Intake - 31.00 mm - Fits 2007-2017 Suzuki RM-Z250
Kibblewhite
$109.33Kibblewhite - 09262758 - Valve - Intake - 31.00 mm - SuzukiFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$109.33 -
Kibblewhite - 96-96166T - Valve - Exhaust - 31.70 mm - 450 RF4 Engine KTM - Fits 2007-2011 KTM engines)
Kibblewhite
$100.95Kibblewhite - 09262753 - Valve - Exhaust - 31.70 mm - 450 RF4 Engine KTMFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion...$100.95 -
Kibblewhite - 30-31462T - Valve - Intake - 30.50 mm - Honda
Kibblewhite
$109.33Kibblewhite - 09262742 - Valve - Intake - 30.50 mm - HondaFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$109.33 -
Kibblewhite - 60-60210T - Valve - Intake - 31.00 mm - Suzuki
Kibblewhite
$92.51Kibblewhite - 09262756 - Valve - Intake - 31.00 mm - SuzukiFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$92.51 -
Kibblewhite - 40-40143T - Valve - Exhaust - 25.00 mm - Kawasaki
Kibblewhite
$92.51Kibblewhite - 09262747 - Valve - Exhaust - 25.00 mm - KawasakiFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in...$92.51 -
Kibblewhite - 96-96212T - Valve - Intake - 39.95 mm - 450 XC4 Engine KTM
Kibblewhite
$134.56Kibblewhite - 09262754 - Valve - Intake - 39.95 mm - 450 XC4 Engine KTMFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion...$134.56 -
Kibblewhite - 30-30630T - Valve - Intake - 31.00 mm - Honda
Kibblewhite
$92.51Kibblewhite - 09262740 - Valve - Intake - 31.00 mm - HondaFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$92.51 -
Kibblewhite - 80-80077T - Valve - Exhaust - 24.50 mm - Yamaha
Kibblewhite
$92.51Kibblewhite - 09262764 - Valve - Exhaust - 24.50 mm - YamahaFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$92.51 -
Kibblewhite - 80-80215T - Valve - Center Intake - 27.00 mm - Yamaha
Kibblewhite
$92.51Kibblewhite - 09262766 - Valve - Center Intake - 27.00 mm - YamahaFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade...$92.51 -
Kibblewhite - 60-60712T - Valve - Intake - 36.00 mm - Fits 2008-2020 Suzuki RM-Z450
Kibblewhite
$109.33Kibblewhite - 09262760 - Valve - Intake - 36.00 mm - SuzukiFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$109.33 -
Kibblewhite - 40-40140T - Valve - Intake - 31.00 mm - Kawasaki
Kibblewhite
$92.51Kibblewhite - 09262746 - Valve - Intake - 31.00 mm - KawasakiFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in...$92.51 -
Kibblewhite - 30-33662 - Valve - Intake - 30.00 mm - Standard - Honda
Kibblewhite
$37.55Kibblewhite - 09263286 - Valve - Intake - 30.00 mm - Standard - HondaFeaturesLightweight, strong, one piece forging with profiles that provide excellent flow characteristicsValve is infused by a...$37.55 -
Kibblewhite - 96-96450 - Valve and Spring Kit - 0.425" Lift - KTM 250XCF-W | 250 RC4 Engines '08-'11 - Fits KTM 2008-2011 250 (for RC4 engines), 2012-2013 250 XCF-W
Kibblewhite
$218.32Kibblewhite - 09262736 - Valve and Spring Kit - 0.425" Lift - KTM 250XCF-W | 250 RC4 Engines '08-'11FeaturesExtends the life of the valvetrain and intake components by as much as 4x over the OEM...$218.32 -
Je Pistons - 136633 - Piston Kit - 100.00 mm - 10.5:1 CR - Fits 1996-2011 Suzuki DR650
Je Pistons
$283.99Je Pistons - 09105759 - Piston Kit - 100.00 mm - 10.5:1 CR - SuzukiFeaturesMachined from 2618-T6 high tensile forged aluminumDomed, dished or flat top features smooth flowing radii; require no...$283.99 -
Hot Rods - K083 - Crankshaft Bearings - Gas Gas/Husqvarna/KTM - Fits 2021-2023 Gas Gas MC 50, 2013-2023 KTM 50 SX Mini, 2013-2023 KTM 50 SX, 2017-2023 Husqvarna TC 50, 2018-2023 Husqvarna TC 50 Mini
Hot Rods
$45.95Hot Rods - 09240286 - Crankshaft Bearings - Gas Gas/Husqvarna/KTMFeaturesKit contains two main bearings and two seals, unless notedSpecs$45.95 -
Je Pistons - 379029 - Piston Kit - 78.00 mm - 14.1:1 CR - Fits 2021-2022 Kawasaki KX250
Je Pistons
$314.99Je Pistons - 09106390 - Piston Kit - 78.00 mm - 14.1:1 CR - KawasakiFeaturesMachined from 2618-T6 high tensile forged aluminumDomed, dished or flat top features smooth flowing radii; require no...$314.99 -
Kyb - 110310000201 - Front Fork Seal for Free Piston Shaft - Multiple Models
KYB
$4.95Kyb - 04070394 - Front Fork Seal for Free Piston ShaftFeaturesSpecsRiding StyleOff-Road$4.95 -
Je Pistons - 379030 - Piston Kit - 78.00 mm - 14.5:1 CR - Kawasaki
Je Pistons
$314.99Je Pistons - 09106391 - Piston Kit - 78.00 mm - 14.5:1 CR - KawasakiFeaturesMachined from 2618-T6 high tensile forged aluminumDomed, dished or flat top features smooth flowing radii; require no...$314.99 -
La Sleeve - FL5796 - Cylinder Sleeve - 47.00 mm - Husqvarna | KTM - Fits 2018-2019 Husqvarna TC 85, 1995-1997 Kawasaki KX80
LA Sleeve
MSRP: $134.95$117.95La Sleeve - 09311010 - Cylinder Sleeve - 47.00 mm - Husqvarna | KTMFeaturesOutside diameter precision centerless groundQuality replacement cylinder sleeves give old cylinders new lifeCylinder...MSRP: $134.95$117.95 -
Hot Rods - HR00105 - Bottom End Kit - OE Crankshaft Replacement - Fits 2017-2018 Honda CRF450R/RX
Hot Rods
$662.95Hot Rods - 09210889 - Bottom End Kit - OE Crankshaft Replacement - HondaFeaturesKit does not include water pump seal.Specs$662.95 -
Hot Rods - WB110 - Wrist Pin Bearing - 15 mm x 19 mm x 16.7 mm KZT - Honda/Kawasaki/Yamaha - Fits 2001-2025 Yamaha YZ125, 2020-2025 Yamaha YZ125X, 1994-1997 Kawasaki KX125, 1988-2007 Honda CR125R
Hot Rods
$23.05Hot Rods - 09240570 - Wrist Pin Bearing - 15 mm x 19 mm x 16.7 mm KZT - Honda/Kawasaki/YamahaFeaturesCase hardened bearing cagesFlat (KU style) bearing cage profiles and long shouldered (KZ style)...$23.05 -
Hot Rods - WB102 - Wrist Pin Bearing - 12 mm x 15 mm x 16.3 mm KZT - Gas Gas/Husqvarna/KTM - Fits 2017-2025 Husqvarna TC 65, 2000-2025 KTM 65 SX, 2021-2025 Gas Gas MC 65
Hot Rods
$23.05Hot Rods - 09240567 - Wrist Pin Bearing - 12 mm x 15 mm x 16.3 mm KZT - Gas Gas/Husqvarna/KTMFeaturesCase hardened bearing cagesFlat (KU style) bearing cage profiles and long shouldered (KZ style)...$23.05 -
Kibblewhite - 30-32800 - Valve Spring Kit - 0.440" Intake Lift/0.405" Exhaust Lift - Honda
Kibblewhite
$222.38Kibblewhite - 09263087 - Valve Spring Kit - 0.440" Intake Lift/0.405" Exhaust Lift - HondaFeaturesDesigned with increased spring rates and high lift compatibility compared to the stock...$222.38 -
Kibblewhite - 96-96540 - Valve and Spring Kit - 0.435" Lift - KTM 450XCF | 450SXF '13-'18 - Fits 2013-2018 KTM 450 SX-F
Kibblewhite
$212.63Kibblewhite - 09263093 - Valve and Spring Kit - 0.435" Lift - KTM 450XCF | 450SXF '13-'18FeaturesExtends the life of the valvetrain and intake components by as much as 4x over the OEM titanium...$212.63 -
Kibblewhite - 30-32812T - Valve - Intake - 38.00 mm - Honda
Kibblewhite
$92.51Kibblewhite - 09263056 - Valve - Intake - 38.00 mm - HondaFeaturesFinished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistantMade in the...$92.51 -
Kibblewhite - 71040-4 - Valve Guide Seals - Solid Viton® - Fits Yamaha 2010-2017 YZ450F, 2016-2018 YZ450FX
Kibblewhite
$13.96Kibblewhite - 09263100 - Valve Guide Seals - Solid Viton® - YamahaFeaturesMade in the USAReplacement Part for OEM Number(s):51Y121190000Specs$13.96 -
Kibblewhite - 96-96500 - Valve Spring Kit - 0.435" Lift - Beehive Racing - Husqvarna | KTM - Fits 2014-2018 Husqvarna FC 450, 2017-2018 Husqvarna FS 450, 2017 Husqvarna FX 450, 2013-2018 KTM 450 SX-F
Kibblewhite
$193.68Kibblewhite - 09263042 - Valve Spring Kit - 0.435" Lift - Beehive Racing - Husqvarna | KTMFeaturesProgressively wound springs using Kobe super-clean, chrome silicon-based wire the is heat-treated and...$193.68 -
Kibblewhite - 40-40520 - Valve Guide - Intake - 0.3765" OD - Kawasaki
Kibblewhite
$30.72Kibblewhite - 09263096 - Valve Guide - Intake - 0.3765" OD - KawasakiFeaturesWith any battery operated or electric drill you can ream and hone manganese valve guides in less timeExpect the same...$30.72 -
Kibblewhite - 80-80120 - Valve Guide - Exhaust - 0.3957" OD - Yamaha
Kibblewhite
$22.29Kibblewhite - 09263098 - Valve Guide - Exhaust - 0.3957" OD - YamahaFeaturesMade from copper based C63000 nickel-aluminum bronzeThe 5% nickel content provides superior resistance to wear, and the...$22.29 -
Kibblewhite - 96-96520-E - Valve Guide - Exhaust - 0.4352" OD - KTM
Kibblewhite
$22.95Kibblewhite - 09263046 - Valve Guide - Exhaust - 0.4352" OD - KTMFeaturesMade from copper based C63000 nickel-aluminum bronzeThe 5% nickel content provides superior resistance to wear, and the...$22.95 -
Kibblewhite - 30-33100 - Top End Kit - Black Diamond™ Valves with Piston Kit - Honda CRF450R - Fits 2007-2008 Honda CRF450R
Kibblewhite
$660.02Kibblewhite - 09031595 - Top End Kit - Black Diamond™ Valves with Piston Kit - Honda CRF450RFeaturesPistons fully machined from 2618 aluminum alloy with a performance skirt coatingLightweight racing...$660.02 -
Kibblewhite - 96-96520-I - Valve Guide - Intake - 0.4352" OD - KTM
Kibblewhite
$22.95Kibblewhite - 09263045 - Valve Guide - Intake - 0.4352" OD - KTMFeaturesMade from copper based C63000 nickel-aluminum bronzeThe 5% nickel content provides superior resistance to wear, and the...$22.95 -
Kibblewhite - 30-32900 - Top End Kit - Black Diamond™ Valves with Piston Kit - Honda CRF450X - Fits 2005-2017 Honda CRF450X
Kibblewhite
$660.02Kibblewhite - 09031585 - Top End Kit - Black Diamond™ Valves with Piston Kit - Honda CRF450XFeaturesPistons fully machined from 2618 aluminum alloy with a performance skirt coatingLightweight racing...$660.02 -
Kibblewhite - 30-32812H - Valve - Intake - 38.00 mm - Standard - Honda
Kibblewhite
$37.55Kibblewhite - 09263088 - Valve - Intake - 38.00 mm - Standard - HondaFeaturesElectroplated with a 360º anode, to produce an even coat of the highest grade hard chrome finishMade in the USASpecs$37.55 -
Kibblewhite - 80-82000 - Top End Kit - White Diamond® Valves with Piston Kit - Yamaha WR450F/YZ450F - Fits Yamaha 2007-2015 WR450F, 2006-2009 YZ450F
Kibblewhite
$736.36Kibblewhite - 09031589 - Top End Kit - White Diamond® Valves with Piston Kit - Yamaha WR450F/YZ450FFeaturesPistons fully machined from 2618 aluminum alloy with a performance skirt coatingLightweight...$736.36 -
Kibblewhite - 30-32820 - Valve Guide - Intake - 0.4360" OD - Honda
Kibblewhite
$34.40Kibblewhite - 09263090 - Valve Guide - Intake - 0.4360" OD - HondaFeaturesMade from copper based C63000 nickel-aluminum bronzeThe 5% nickel content provides superior resistance to wear, and the...$34.40 -
Kibblewhite - 30-32700 - Top End Kit - Black Diamond™ Valves with Piston Kit - Honda CRF450R - Fits 2002-2008 Honda CRF450R
Kibblewhite
$706.21Kibblewhite - 09031584 - Top End Kit - Black Diamond™ Valves with Piston Kit - Honda CRF450RFeaturesPistons fully machined from 2618 aluminum alloy with a performance skirt coatingLightweight racing...$706.21 -
Kibblewhite - 80-81900 - Top End Kit - White Diamond® Valves with Piston Kit - Yamaha WR450F/YZ450F - Fits Yamaha 2003-2006 WR450F, 2003-2005 YZ450F
Kibblewhite
$736.36Kibblewhite - 09031588 - Top End Kit - White Diamond® Valves with Piston Kit - Yamaha WR450F/YZ450FFeaturesPistons fully machined from 2618 aluminum alloy with a performance skirt coatingLightweight...$736.36
Dirt Bike Pistons, Top-End Kits and Engine Rebuild Parts
Every dirt bike engine needs a refresh eventually. Ride long enough and the piston wears, compression drops and the bike just doesn't pull like it used to. Staying on top of top-end maintenance keeps your bike making power and keeps a cheap rebuild from turning into an expensive one.
We carry pistons and complete top-end kits from Vertex, Wossner, ProX and Athena, full gasket sets from Cometic and Athena, plus valves, springs, cam chains, bearings, seals and crank kits for full rebuilds. Boyesen reed valves and engine covers add performance and protection on two-strokes and four-strokes alike.
While the engine is apart, refresh the rest: fresh air filters and carb parts from fuel and intake, oil filters and fluids from oils and chemicals, and repacking or a new pipe from dirt bike exhaust.
Engine parts are specific to make, model, year and sometimes bore size, so check fitment carefully before ordering. If you're not sure what your rebuild needs, send us your bike's details and we'll help put the parts list together.