Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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MOOSE RACING Countershaft Sprocket Seal Kit - Suzuki 25-4029
MOOSE RACING
$24.95Countershaft seals are critical wear items that prevent transmission fluid from leaking into the engine case—a failure that can contaminate your oil and compromise engine performance. The MOOSE...09350454- SKU:
- 09350454
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- PRODUCT NAME:
- SEAL KIT
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$24.95 -
MOOSE RACING Exhaust Gasket Kit 823077
MOOSE RACING
$8.13A quality exhaust gasket kit is essential for maintaining a sealed exhaust system and preventing performance-robbing leaks that compromise efficiency and increase emissions. MOOSE RACING's 823077...09345292- SKU:
- 09345292
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823094
MOOSE RACING
$8.13A quality exhaust gasket kit is essential for maintaining a sealed exhaust system and preventing power-robbing leaks that compromise performance and create annoying rattles. The MOOSE RACING 823094...09345295- SKU:
- 09345295
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- EXHAUST
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$8.13 -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husqvarna 808370
MOOSE RACING
$123.32A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise reliability or performance. The MOOSE RACING Complete Motor Gasket Kit eliminates the...09345354- SKU:
- 09345354
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$123.32Qty in Cart: 0Quantity:Price:$123.32Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husqvarna 808373
MOOSE RACING
$127.66A complete engine rebuild demands precision gaskets and seals that won't compromise reliability or performance. This Moose Racing kit eliminates the hassle of sourcing individual components by...09345356- SKU:
- 09345356
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$127.66Qty in Cart: 0Quantity:Price:$127.66Subtotal: -
MOOSE RACING Top End Gasket Kit - Huqvarna/KTM 810370
MOOSE RACING
$70.25A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or your wallet. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction...09345360- SKU:
- 09345360
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$70.25 -
MOOSE RACING Top End Gasket Kit - Husqvarna/KTM 810372
MOOSE RACING
$81.70A top-end rebuild demands precision and reliability—MOOSE RACING gasket kits deliver both at a fraction of OEM pricing. Each set is engineered with high-tech materials to withstand engine stress...09345361- SKU:
- 09345361
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$81.70 -
MOOSE RACING Top End Gasket Kit - Husqvarna/KTM 810373
MOOSE RACING
$70.36A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a...09345362- SKU:
- 09345362
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$70.36 -
MOOSE RACING Top End Gasket Kit - Husqvarna/KTM 810374
MOOSE RACING
$73.09A top-end rebuild demands precision gaskets and seals that won't fail under race conditions or heavy use. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent reliability at a fraction of the...09345363- SKU:
- 09345363
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$73.09 -
MOOSE RACING Top End Gasket Kit - Kawasaki 810485
MOOSE RACING
$81.81A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or reliability. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the...09345364- SKU:
- 09345364
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$81.81 -
MOOSE RACING Top End Gasket Kit - KTM 810976
MOOSE RACING
$71.76Whether you're rebuilding after a piston replacement or performing routine top-end maintenance, a quality gasket kit is non-negotiable for engine reliability. The MOOSE RACING Top End Gasket Kit...09345365- SKU:
- 09345365
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$71.76 -
MOOSE RACING Intake Valve Kit M40-40380
MOOSE RACING
$196.95OEM intake valves wear out and compromise flow efficiency—costing you power and reliability when it matters most. The MOOSE RACING Stainless Steel Intake Valve Kit M40-40380 replaces tired factory...09262441- SKU:
- 09262441
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
$196.95Qty in Cart: 0Quantity:Price:$196.95Subtotal: -
MOOSE RACING Valve and Spring Kit M40-41060
MOOSE RACING
$196.95If you're running your engine hard, OEM titanium valves won't cut it—they wear fast and leave performance on the table. The MOOSE RACING Valve and Spring Kit M40-41060 swaps them out for Black...09262444- SKU:
- 09262444
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- APPLICATION:
- INTAKE
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE AND SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$196.95 -
MOOSE RACING Circlip MSE72048K
MOOSE RACING
$3.95A quality circlip is a critical fastener that prevents component separation under high loads and vibration—exactly what your engine or transmission experiences during aggressive driving. The MOOSE...09130185- SKU:
- 09130185
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- SET
- PRODUCT NAME:
- CIRCLIP
$3.95Qty in Cart: 0Quantity:Price:$3.95Subtotal: -
MOOSE RACING Circlip MSE72050K
MOOSE RACING
$3.95Precision circlips are critical fastening components in high-performance engines and transmissions, where failure can mean catastrophic internal damage. The MOOSE Racing MSE72050K delivers the...09130186- SKU:
- 09130186
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- SET
- APPLICATION:
- PISTON
- PRODUCT NAME:
- CIRCLIP
$3.95Qty in Cart: 0Quantity:Price:$3.95Subtotal: -
MOOSE RACING Piston Kit - 71.94 mm MSE24244B
MOOSE RACING
$235.95If you're rebuilding an engine or replacing worn pistons, you need components engineered to withstand extreme combustion pressures while minimizing thermal distortion and wear. The MOOSE RACING...09105953- SKU:
- 09105953
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 71.94 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$235.95 -
MOOSE RACING Piston Kit - 48.45 mm MSE23637B
MOOSE RACING
$158.95When your engine's piston assembly shows signs of wear or you're rebuilding for increased durability, a quality replacement kit is essential to maintain compression, reduce blow-by, and ensure...09105954- SKU:
- 09105954
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PISTON DIAMETER METRIC:
- 48.45 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
$158.95Qty in Cart: 0Quantity:Price:$158.95Subtotal: -
MOOSE RACING Piston Kit - 57.95 mm MSE24101B
MOOSE RACING
$206.95A piston kit that delivers measurable reliability gains where it counts most—inside your engine. The gravity-cast aluminum construction with 18% silicon content resists thermal distortion and wear,...09105956- SKU:
- 09105956
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PISTON DIAMETER METRIC:
- 57.95 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$206.95 -
MOOSE RACING Piston Ring - For 66.35 mm Piston MSE53010006640
MOOSE RACING
$41.95A worn or damaged piston ring directly compromises combustion efficiency, oil control, and engine longevity. MOOSE Racing piston rings are precision-engineered replacements that restore proper...09120405- SKU:
- 09120405
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON SIZE METRIC:
- STANDARD
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
MOOSE RACING Cam Chain 250-0006
MOOSE RACING
$7.95A cam chain is critical to your engine's valve timing accuracy—failure here means catastrophic internal damage. The MOOSE RACING 250-0006 delivers OEM-equivalent reliability with premium materials...09250800- SKU:
- 09250800
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- NUMBER OF LINKS:
- 122
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BASE FINISH:
- RAW
- TYPE:
- CAM
- CHAIN SIZE:
- 92RH10
- PRODUCT NAME:
- CHAIN
- MODEL:
- SILENT
$7.95Qty in Cart: 0Quantity:Price:$7.95Subtotal:
