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 Top End Gasket - KTM/Husqvarna 810991
MOOSE RACING
$98.96A top-end rebuild demands precision—mismatched or worn gaskets will compromise compression, leak oil, and undermine all your other work. The MOOSE RACING Top End Gasket set eliminates guesswork by delivering every seal, O-ring, and gasket you need in one...09345887- SKU:
- 09345887
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
$98.96 -
MOOSE RACING Motor Gasket Kit with Seal 811376
MOOSE RACING
$182.97A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of dealership pricing, giving you the...09345888- SKU:
- 09345888
- Availability:
- Ships Same Business Day
- Weight:
- 0.48 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
$182.97Qty in Cart: 0Quantity:Price:$182.97Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal 811984
MOOSE RACING
$198.99A complete engine and transmission rebuild requires gaskets and seals that match OEM specifications without the premium price tag. MOOSE RACING's Motor Gasket Kit delivers genuine OEM-quality seals and precision-formed gaskets for the entire drivetrain,...09345889- SKU:
- 09345889
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$198.99 -
MOOSE RACING Motor Gasket Kit with Seal 811989
MOOSE RACING
$210.06A complete engine and transmission rebuild demands precision-fit gaskets and seals—and OEM replacements often come with OEM pricing. The MOOSE RACING Motor Gasket Kit delivers genuine OEM-quality seals at a fraction of the cost, giving you the confidence...09345890- SKU:
- 09345890
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$210.06 -
MOOSE RACING Ignition Cover Gasket 816098
MOOSE RACING
$6.09A leaking ignition cover gasket compromises engine reliability and can lead to oil seepage that damages surrounding components. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of OEM pricing, giving you the confidence to...09345892- SKU:
- 09345892
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$6.09 -
MOOSE RACING Ignition Cover Gasket 816295
MOOSE RACING
$13.64Ignition cover gaskets fail silently, often leaving you stranded with oil leaks that compromise engine integrity and performance. The MOOSE RACING 816295 delivers OEM-quality sealing at a fraction of dealership pricing, making it the smart choice for...09345893- SKU:
- 09345893
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$13.64 -
MOOSE RACING Ignition Cover Gasket 816299
MOOSE RACING
$13.64A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that attracts dirt and debris into critical engine components. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of factory replacement...09345894- SKU:
- 09345894
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- ENGINE TYPE:
- 4-STROKE
$13.64 -
MOOSE RACING Ignition Cover Gasket 816317
MOOSE RACING
$13.64A leaking ignition cover gasket compromises engine sealing and can lead to oil contamination and performance loss. The MOOSE RACING 816317 delivers OEM-level fit and durability at a fraction of OEM pricing, making it the smart choice for engine rebuilds,...09345895- SKU:
- 09345895
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$13.64 -
MOOSE RACING Ignition Cover Gasket 816749
MOOSE RACING
$11.24A leaking ignition cover gasket compromises engine sealing and can lead to oil seepage that damages surrounding components. The MOOSE RACING Ignition Cover Gasket (816749) delivers OEM-equivalent fitment and durability at a fraction of OEM pricing,...09345896- SKU:
- 09345896
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$11.24Qty in Cart: 0Quantity:Price:$11.24Subtotal: -
MOOSE RACING Ignition Cover Gasket 816755
MOOSE RACING
$14.83A leaking ignition cover gasket compromises engine sealing and can lead to oil contamination and performance loss. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of OEM pricing, making it an economical choice for both...09345897- SKU:
- 09345897
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$14.83Qty in Cart: 0Quantity:Price:$14.83Subtotal: -
MOOSE RACING Clutch Cover - KTM/Husqvarna D70-5431MB
MOOSE RACING
$159.95A clutch cover failure mid-race or trail ride can leave you stranded. The MOOSE RACING Clutch Cover for KTM and Husqvarna models is engineered to withstand the demands of high-performance riding with superior heat management and durability that exceeds...09401856- SKU:
- 09401856
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
$159.95 -
MOOSE RACING Ignition Cover - Yamaha 250 D70-4472MB
MOOSE RACING
$184.95Your stock ignition cover is vulnerable to impact damage and thermal stress—especially in competitive riding conditions. This MOOSE RACING cover replaces it with aircraft-grade aluminum construction that withstands hard crashes while managing heat more...09401868- SKU:
- 09401868
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BASE COLOR:
- BLACK
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- TYPE:
- IGNITION
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
$184.95 -
MOOSE RACING Ignition Cover - KTM D70-5471MB
MOOSE RACING
$219.95Your stock ignition cover is vulnerable to thermal stress and impact damage—especially under high-RPM conditions or aggressive riding. The MOOSE RACING Ignition Cover replaces weak OEM plastic with aircraft-grade aluminum construction, delivering...09401869- SKU:
- 09401869
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION
- BASE COLOR:
- BLACK
- MATERIAL:
- ALUMINUM
$219.95 -
On Sale
MOOSE RACING Water Pump Cover - Black I04-5254B
MOOSE RACING
MSRP: $101.95Now: $65.00Was: $101.95The stock cast water pump cover on your engine is vulnerable to corrosion, impact damage, and premature failure—especially under racing conditions or extended use. The MOOSE RACING Water Pump Cover delivers superior durability with a robust construction...09401933- SKU:
- 09401933
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- TYPE:
- WATER PUMP
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $101.95Now: $65.00Was: $101.95 -
MOOSE RACING Complete Motor Gasket Kit - KX250 808455
MOOSE RACING
$58.40A complete engine and transmission rebuild demands precision gasket sealing—any leak or premature failure compromises performance and reliability. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-grade quality at a fraction of OEM pricing,...M808455- SKU:
- M808455
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$58.40 -
MOOSE RACING Complete Motor Gasket Kit - KX250 808457
MOOSE RACING
$70.11A complete engine rebuild demands precision gaskets and seals that won't compromise performance or longevity. The MOOSE RACING Complete Motor Gasket Kit gives you OEM-quality replacement seals and gaskets at a fraction of OEM pricing, allowing you to...M808457- SKU:
- M808457
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$70.11Qty in Cart: 0Quantity:Price:$70.11Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - RM80 808504
MOOSE RACING
$43.80A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of sourcing individual components by bundling every...M808504- SKU:
- M808504
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$43.80Qty in Cart: 0Quantity:Price:$43.80Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - RM85 808505
MOOSE RACING
$48.17A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under load—and OEM replacements can drain your budget fast. The MOOSE RACING Complete Motor Gasket Kit delivers genuine OEM-quality seals and gaskets at a...M808505- SKU:
- M808505
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$48.17 -
MOOSE RACING Complete Motor Gasket Kit - RM125 808548
MOOSE RACING
$65.73A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your performance or reliability. The MOOSE RACING Complete Motor Gasket Kit eliminates the hassle of sourcing individual components, delivering every...M808548- SKU:
- M808548
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ENGINE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
$65.73 -
MOOSE RACING Complete Motor Gasket Kit - RM125 808549
MOOSE RACING
$83.24A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—this kit includes everything you need without the OEM price tag. Moose Racing's domestically manufactured gasket sets use high-tech materials...M808549- SKU:
- M808549
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$83.24
