Dirt Bike Engine
5140 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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Works Connection - 24-P604 - Engine Plug - Purple - Fits Honda 2019-2024 CRF250F, 2018-2024 CRF250R, 2019-2024 CRF250RX
Works Connection
$55.95Works Connection - 09501035 - Engine Plug - Purple - HondaFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a mirror finish...$55.95 -
Wossner - P2078-R - Connecting Rod Kit - Performance - Fits 2022-2026 Kawasaki KX112
Wossner
$242.00Wossner - 09230705 - Connecting Rod Kit - Performance - KawasakiFeaturesKit includes connecting rod and top end needle bearingsReplacement Part for OEM Number(s):130320811Specs$242.00 -
Wossner - P4085 - Connecting Rod Kit - Standard - Fits Yamaha 2020-2022 WR450F, 2020-2025 YZ450F, 2021-2023 YZ450FX
Wossner
$174.00Wossner - 09230703 - Connecting Rod Kit - Standard - YamahaFeaturesDesigned to fit OEM bearing and crank pinGerman engineeredFour stroke rods include bronze-bushed small end for reduced friction and...$174.00 -
Works Connection - 24-P551 - Engine Plug - Purple - Fits Yamaha 2003-2013 WR250F, 2003-2015 WR450F, 2006-2009 YZ450F
Works Connection
$55.95Works Connection - 09501036 - Engine Plug - Purple - YamahaFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a mirror finish...$55.95 -
Works Connection - 24-P491 - Engine Plug - Purple - Honda
Works Connection
$38.50Works Connection - 09501037 - Engine Plug - Purple - HondaFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a mirror finish...$38.50 -
Works Connection - 24-P624 - Engine Plug - Purple - Kawasaki
Works Connection
$55.95Works Connection - 09501034 - Engine Plug - Purple - KawasakiFeaturesSimple positive installation with an Allen wrenchSet of two plugs (unless noted) replaces the stock plugsPolished to a mirror...$55.95 -
Wossner - 4093DA - Piston Kit - 96.96 mm - Yamaha
Wossner
$244.00Wossner - 09106842 - Piston Kit - 96.96 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$244.00 -
Wossner - 4092DA - Piston Kit - 96.96 mm - Yamaha
Wossner
$224.00Wossner - 09106841 - Piston Kit - 96.96 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$224.00 -
Wossner - 4087DA - Piston Kit - 95.95 mm - Fits 2016-2018 Kawasaki KX450F
Wossner
$224.00Wossner - 09106840 - Piston Kit - 95.95 mm - KawasakiFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$224.00 -
Wossner - 4085DA - Piston Kit - 96.96 mm - Fits 2023-2026 Yamaha YZ450F
Wossner
$224.00Wossner - 09106838 - Piston Kit - 96.96 mm - YamahaFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross sectionForged from...$224.00 -
Wossner - 4077DA - Piston Kit - 80.95 mm - Gas Gas | Husqvarna | KTM - Fits 2024-2025 Gas Gas MC 250F, 2023-2025 Husqvarna FC 250, 2023-2025 KTM 250 SX-F
Wossner
$204.00Wossner - 09106835 - Piston Kit - 80.95 mm - Gas Gas | Husqvarna | KTMFeaturesOptimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross...$204.00 -
Wossner - K7082DA-3 - Piston Kit - 70.37 mm - Ski Doo 809 Engine Type Mach Z Triple
Wossner
$576.00Wossner - 09106676 - Piston Kit - 70.37 mm - Ski Doo 809 Engine Type Mach Z TripleFeaturesKit includes piston, rings, wrist pin, and retaining clips unless notedSpecs$576.00 -
Wossner - K7072DA-2 - Piston Kit - 71.86 mm - Ski Doo 600
Wossner
$344.00Wossner - 09106672 - Piston Kit - 71.86 mm - Ski Doo 600FeaturesKit includes piston, rings, wrist pin, and retaining clips unless notedSpecs$344.00 -
Wossner - K7073DA-2 - Piston Kit - 73.68 mm - Polaris 600 IQ
Wossner
$384.00Wossner - 09106668 - Piston Kit - 73.68 mm - Polaris 600 IQFeaturesKit includes piston, rings, wrist pin, and retaining clips unless notedSpecs<$384.00 -
Ufo - YA03872-089 - Fork Tube Protectors - Blue
UFO
$30.95Ufo - 04120057 - Fork Tube Protectors - BlueFeaturesPre-drilled pieces mount easily to stock locationsSpecsRidin$30.95 -
Ufo - YA03872-046 - Fork Tube Protectors - White
UFO
$30.95Ufo - 04120056 - Fork Tube Protectors - WhiteFeaturesPre-drilled pieces mount easily to stock locationsSpecsBase$30.95 -
Vertex - 719204 - Exhaust Valve Gasket Kit - Ski-Doo
Vertex
$30.13Vertex - 09347438 - Exhaust Valve Gasket Kit - Ski-DooFeaturesImpact-absorbing rubber inserts positioned to cushion the contact between part and engine coverPerfect shape to perfectly fit your bike...$30.13 -
Vertex - 711330 - Complete Gasket Kit - Polaris
Vertex
$217.42Vertex - 09347433 - Complete Gasket Kit - PolarisFeaturesMade in the USASpecsRiding StyleSnow$217.42 -
Vertex - 711258 - Complete Gasket Kit - Ski-Doo
Vertex
$114.88Vertex - 09347427 - Complete Gasket Kit - Ski-DooFeaturesMade in the USASpecsRiding StyleSnow$114.88 -
Vertex - 711237 - Complete Gasket Kit - Polaris
Vertex
$87.20Vertex - 09347425 - Complete Gasket Kit - PolarisFeaturesMade in the USASpecsTypeComplete$87.20 -
Vertex - 711084 - Complete Gasket Kit - Ski-Doo/Moto-Ski
Vertex
$45.80Vertex - 09347414 - Complete Gasket Kit - Ski-Doo/Moto-SkiFeaturesMade in the USASpecsProduct NameGaske$45.80 -
Vertex - 7111820 - Complete Gasket Kit - Yamaha
Vertex
$55.47Vertex - 09347420 - Complete Gasket Kit - YamahaFeaturesMade in the USASpecsTypeComplete<$55.47 -
Vertex - 710322 - Full Top End Gasket Kit - Ski-Doo
Vertex
$219.42Vertex - 09347407 - Full Top End Gasket Kit - Ski-DooFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$219.42 -
Vertex - 710328 - Full Top End Gasket Kit - Polaris
Vertex
$94.38Vertex - 09347409 - Full Top End Gasket Kit - PolarisFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$94.38 -
Vertex - 710320 - Full Top End Gasket Kit - Arctic Cat
Vertex
$170.83Vertex - 09347406 - Full Top End Gasket Kit - Arctic CatFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$170.83 -
Vertex - 710239 - Full Top End Gasket Kit - Yamaha
Vertex
$45.78Vertex - 09347391 - Full Top End Gasket Kit - YamahaFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$45.78 -
Vertex - 710182 - Full Top End Gasket Kit - Yamaha
Vertex
$41.12Vertex - 09347385 - Full Top End Gasket Kit - YamahaFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$41.12 -
Vertex - 710064 - Full Top End Gasket Kit - Moto-Ski/Ski-Doo
Vertex
$40.25Vertex - 09347380 - Full Top End Gasket Kit - Moto-Ski/Ski-DooFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$40.25 -
Vertex - 710105 - Full Top End Gasket Kit - Arctic Cat
Vertex
$22.67Vertex - 09347382 - Full Top End Gasket Kit - Arctic CatFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$22.67 -
Vertex - 710024 - Full Top End Gasket Kit - Moto-Ski/Ski-Doo
Vertex
$24.12Vertex - 09347378 - Full Top End Gasket Kit - Moto-Ski/Ski-DooFeaturesA performance kit designed for cylinder rebuild and piston replacementMade in the USASpecs$24.12 -
Vertex - 22447 - Piston Kit - 88.95 mm - Honda CR500R - Fits 1985-2004 Honda CR500R
Vertex
$242.95Vertex - 09101036 - Piston Kit - 88.95 mm - Honda CR500RFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$242.95 -
Vertex - 22685C - Piston Kit - 53.94 mm - Honda CR125R - Fits 2000-2003 Honda CR125R
Vertex
$164.95Vertex - 09101028 - Piston Kit - 53.94 mm - Honda CR125RFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$164.95 -
Vertex - 22809B - Piston Kit - 66.35 mm - Honda CR250R - Fits 2002-2004 Honda CR250R
Vertex
$189.95Vertex - 09101034 - Piston Kit - 66.35 mm - Honda CR250RFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$189.95 -
Vertex - 72074K - Piston Circlips
Vertex
$4.15Vertex - 09130056 - Piston CirclipsFeaturesSpecsRiding StyleOff-RoadRi$4.15 -
Vertex - 23375B - Piston Kit - 71.95 mm - Husqvarna | KTM
Vertex
$254.95Vertex - 09101002 - Piston Kit - 71.95 mm - Husqvarna | KTMFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeGravity-cast...$254.95 -
Vertex - 22481CD - Piston Kit - 44.97 mm - Husqvarna CR65 | KTM 65SX - Fits 1997-2008 KTM 65 SX
Vertex
$106.95Vertex - 09100981 - Piston Kit - 44.97 mm - Husqvarna CR65 | KTM 65SXFeaturesPiston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston...$106.95 -
Vertex - 501453 - Oil Seal - 35 mm x 50 mm x 8 mm - Kawasaki
Vertex
$8.22Vertex - OS1395 - Oil Seal - 35 mm x 50 mm x 8 mm - KawasakiFeaturesSpecsTypeOil$8.22 -
Vertex - 7111640 - Complete Gasket Set - Ski-Doo
Vertex
$35.55Vertex - G164 - Complete Gasket Set - Ski-DooFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$35.55 -
Vertex - 711148 - Complete Gasket Set - Arctic Cat
Vertex
$30.75Vertex - G148 - Complete Gasket Set - Arctic CatFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$30.75 -
Vertex - 711140A - Complete Gasket Set - Yamaha
Vertex
$63.22Vertex - G140A - Complete Gasket Set - YamahaFeaturesFit most current and many non-current engines, including Sachs, JLO, Hirth, CCW, Kohler and XenoahDesigned to replace OEM gaskets exactlyKit...$63.22
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.