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 Complete Motor Gasket - Kit - Yamaha YZ 85 8080025
MOOSE RACING
$80.32A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising here risks oil leaks, compression loss, and premature failure. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-equivalent quality at a fraction of the...09346537- SKU:
- 09346537
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$80.32 -
MOOSE RACING Gasket - Top End - CRF250 8100000
MOOSE RACING
$80.46A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Set delivers OEM-equivalent reliability at a fraction of the price, with every component engineered for...09346538- SKU:
- 09346538
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$80.46 -
MOOSE RACING Clutch Cover Gasket 819193
MOOSE RACING
$7.23A leaking clutch cover gasket can compromise engine sealing and lead to oil loss—exactly what you want to avoid during critical race sessions or long-distance driving. The MOOSE RACING Clutch Cover Gasket delivers OEM-equivalent sealing performance at a...09346539- SKU:
- 09346539
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$7.23 -
MOOSE RACING Inner Clutch Cover Gasket 816354
MOOSE RACING
$20.12A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent fitment and reliability at a fraction of OEM pricing, making it the smart choice for...09346540- SKU:
- 09346540
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$20.12Qty in Cart: 0Quantity:Price:$20.12Subtotal: -
MOOSE RACING Motor Seals - CR80R/85R 822181
MOOSE RACING
$30.16Engine seal failures compromise compression, invite oil leakage, and invite catastrophic internal damage—especially critical on a race-prepped CR80R or CR85R where reliability is non-negotiable. MOOSE Racing Motor Seals deliver OEM-equivalent fitment and...09350028- SKU:
- 09350028
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$30.16 -
MOOSE RACING Motor Seals - CRF250R/X 822248
MOOSE RACING
$59.71Engine gaskets and seals wear out—they're not a question of if, but when. MOOSE RACING Motor Seals deliver OEM-equivalent performance at a fraction of OEM pricing, letting you rebuild with confidence without breaking the bank. This complete set covers...09350033- SKU:
- 09350033
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SEAL
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
$59.71 -
MOOSE RACING Motor Seals - KX250 822257
MOOSE RACING
$33.37Engine seals are critical wear items that deteriorate over time, compromising compression, oil containment, and overall reliability. MOOSE RACING Motor Seals deliver OEM-equivalent performance at a fraction of OEM pricing, allowing you to rebuild with...09350034- SKU:
- 09350034
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- OIL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$33.37 -
MOOSE RACING Motor Seals - 50 Adventure Mini/Senior 822246
MOOSE RACING
$15.87Engine seal failure is one of the most common causes of oil leaks and performance degradation in mini/senior racing applications. The MOOSE RACING Motor Seals set delivers OEM-equivalent reliability at a fraction of OEM pricing, allowing you to rebuild...09350035- SKU:
- 09350035
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$15.87Qty in Cart: 0Quantity:Price:$15.87Subtotal: -
MOOSE RACING Motor Seals - KTM/Husqvarna 822269
MOOSE RACING
$35.24When rebuilding your KTM or Husqvarna engine and transmission, OEM seals carry a premium price tag that doesn't reflect the actual performance gain. The MOOSE RACING Motor Seals deliver genuine OEM-quality reliability at a fraction of the cost, using...09350036- SKU:
- 09350036
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
$35.24 -
MOOSE RACING Complete Gasket Set 8110012
MOOSE RACING
$242.14A complete gasket set is the foundation of engine reliability—sealing critical junctions where combustion pressure, coolant, and oil demand absolute integrity. Whether you're rebuilding after high-mileage wear or assembling a freshly-machined block, the...09346916- SKU:
- 09346916
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$242.14 -
MOOSE RACING Gasket Clutch Inner - Yamaha 816322
MOOSE RACING
$15.13A worn or damaged clutch inner gasket compromises your clutch pack's seal integrity, leading to fluid leakage, slippage, and unpredictable engagement—all of which threaten your ride's reliability and performance. The MOOSE RACING Gasket Clutch Inner is...09346937- SKU:
- 09346937
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- TYPE:
- CLUTCH INNER
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$15.13Qty in Cart: 0Quantity:Price:$15.13Subtotal: -
MOOSE RACING Ignition Cover Gasket 816605
MOOSE RACING
$6.67A compromised ignition cover gasket can lead to oil seepage, contamination of your ignition system, and potential performance loss at critical moments. The MOOSE RACING Ignition Cover Gasket 816605 delivers OEM-equivalent sealing reliability with the...09346940- SKU:
- 09346940
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$6.67 -
MOOSE RACING Gasket Clutch Inner - Yamaha 817676
MOOSE RACING
$13.64A worn or damaged clutch inner gasket compromises your clutch assembly's sealing integrity, leading to fluid leakage, slippage, and potential drivetrain failure. MOOSE RACING's precision gasket clutch inner restores a reliable seal and consistent clutch...09346942- SKU:
- 09346942
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH INNER
$13.64 -
MOOSE RACING Complete Gasket Set - KTM 125 808309
MOOSE RACING
$74.51A complete gasket set is essential maintenance for any KTM 125 engine that's been rebuilt, bored, or heavily raced. Worn or compromised gaskets lead to compression loss, oil seepage, and unreliable performance on the track or trail. MOOSE RACING's...09346944- SKU:
- 09346944
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET SET
$74.51Qty in Cart: 0Quantity:Price:$74.51Subtotal: -
MOOSE RACING Complete Gasket Set - KTM 85 808315
MOOSE RACING
$74.51A complete gasket set is essential maintenance for any KTM 85 engine rebuild or top-end service, ensuring proper sealing and preventing fluid leaks that compromise performance and reliability. MOOSE RACING's OEM-quality gasket set eliminates guesswork by...09346945- SKU:
- 09346945
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$74.51 -
MOOSE RACING Complete Gasket Set - KTM 250 808328
MOOSE RACING
$146.11A complete gasket set is essential for any KTM 250 engine rebuild or top-end service—worn or damaged gaskets are a leading cause of compression loss, oil leaks, and coolant seepage that compromise performance and reliability. MOOSE RACING gaskets are...09346946- SKU:
- 09346946
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$146.11 -
MOOSE RACING Complete Gasket Set - Suzuki 808531
MOOSE RACING
$70.11A complete gasket set is essential for any engine rebuild or top-end overhaul—it ensures a perfect seal across all critical engine surfaces and eliminates the risk of oil leaks, coolant seepage, or combustion blowby that can compromise performance and...09346947- SKU:
- 09346947
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$70.11 -
MOOSE RACING Gasket Clutch Inner - KTM 816212
MOOSE RACING
$15.18A worn or damaged clutch inner gasket compromises your KTM's sealing integrity, leading to oil leakage and potential clutch slippage during aggressive riding. The MOOSE RACING Gasket Clutch Inner restores proper pressure containment and maintains...09346963- SKU:
- 09346963
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH INNER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$15.18 -
MOOSE RACING Ignition Cover Gasket 816629
MOOSE RACING
$5.58A quality ignition cover gasket is critical to preventing oil leaks and maintaining proper engine sealing on your race engine or high-performance build. The MOOSE Racing Ignition Cover Gasket delivers reliable, long-lasting sealing that withstands the...09346965- SKU:
- 09346965
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$5.58 -
MOOSE RACING Ignition Cover Gasket 816735
MOOSE RACING
$10.90A reliable ignition cover gasket is critical to preventing oil seepage and maintaining proper engine sealing—especially under high-RPM racing conditions where heat and pressure stress every component. The MOOSE Racing gasket delivers OEM-equivalent...09346967- SKU:
- 09346967
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$10.90
