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 Exhaust Gasket Kit 823051
MOOSE RACING
$8.13A properly sealed exhaust system is critical to maintaining engine performance and preventing power loss from exhaust leaks. The MOOSE RACING Exhaust Gasket Kit 823051 delivers OEM-quality sealing...09345277- SKU:
- 09345277
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823103
MOOSE RACING
$14.99A worn or damaged exhaust gasket can destroy your seal integrity, leading to exhaust leaks, performance loss, and unwanted noise. This MOOSE RACING kit gives you the complete gasket set needed for a...09345302- SKU:
- 09345302
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET KIT
$14.99 -
MOOSE RACING Exhaust Gasket Kit 823105
MOOSE RACING
$21.87A quality exhaust gasket kit is essential for preventing exhaust leaks that compromise both performance and engine longevity. MOOSE RACING's 823105 kit ensures reliable sealing across your exhaust...09345304- SKU:
- 09345304
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- EXHAUST
- UNITS:
- KIT
$21.87 -
MOOSE RACING Exhaust Gasket Kit 823106
MOOSE RACING
$21.87A proper exhaust seal is non-negotiable for performance and longevity. Worn or degraded gaskets allow exhaust leaks that compromise tuning, reduce horsepower, and introduce unwanted noise into your...09345305- SKU:
- 09345305
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- EXHAUST
$21.87 -
MOOSE RACING Exhaust Gasket Kit 823146
MOOSE RACING
$21.87A quality exhaust gasket kit is essential to maintaining a leak-free seal between your exhaust manifold and cylinder head—preventing performance loss from exhaust bypass and protecting against carbon...09345328- SKU:
- 09345328
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$21.87 -
MOOSE RACING Exhaust Gasket Kit 823147
MOOSE RACING
$21.87A quality exhaust gasket kit is essential for maintaining a proper seal between exhaust manifold and header flanges—preventing exhaust leaks that compromise performance and create unwanted noise...09345329- SKU:
- 09345329
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$21.87 -
MOOSE RACING Gasket - Top End - YZ65 8100008
MOOSE RACING
$24.85A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. MOOSE RACING delivers OEM-quality replacement gaskets and seals manufactured right...09346581- SKU:
- 09346581
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- TOP END
$24.85 -
MOOSE RACING Complete Gasket Kit - Yamaha 8080008
MOOSE RACING
$52.54A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise integrity under load. The MOOSE RACING Complete Gasket Kit eliminates the headache of sourcing...09346592- SKU:
- 09346592
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CYLINDER HEAD
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
$52.54 -
MOOSE RACING Head Cover Gasket - KTM 817985
MOOSE RACING
$13.64Oil leaks from a worn head cover gasket don't just look bad—they signal internal wear that can compromise engine performance and reliability. The OEM gasket replacement comes with an equally painful...09346184- SKU:
- 09346184
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
- TYPE:
- VALVE COVER
- UNITS:
- EACH
$13.64 -
MOOSE RACING Motor Seals - KLX/DRZ 110 822216
MOOSE RACING
$22.94Engine gaskets and seals degrade over time, compromising compression and allowing oil leakage that can damage your engine's longevity. Rather than sourcing multiple OEM seals at premium pricing, the...09350078- SKU:
- 09350078
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$22.94 -
MOOSE RACING Motor Seals - KX250F 822316
MOOSE RACING
$62.53Engine seal degradation is one of the quickest ways to compromise reliability and performance on your KX250F. MOOSE RACING Motor Seals deliver OEM-equivalent fitment and durability at a fraction of...09350079- SKU:
- 09350079
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SEAL
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
$62.53 -
MOOSE RACING Water Pump Rebuild Kit 821997
MOOSE RACING
$56.24A failing water pump compromises your engine's cooling efficiency and can lead to catastrophic overheating during competition or spirited driving. The MOOSE RACING Water Pump Rebuild Kit 821997 gives...09346696- SKU:
- 09346696
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- REPAIR KIT
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$56.24 -
MOOSE RACING Complete Motor Gasket - Kit - Kawasaki 450 8080026
MOOSE RACING
$207.98A complete engine and transmission rebuild demands precision gaskets and seals that won't fail mid-season. The MOOSE RACING Complete Motor Gasket Kit for Kawasaki 450 eliminates the frustration of...09346536- SKU:
- 09346536
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$207.98 -
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...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 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...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 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...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 - 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...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...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 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...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...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
