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 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 proper exhaust system refresh, ensuring optimal flow...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 system, eliminating unwanted gases escaping before they...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 system. The MOOSE RACING Exhaust Gasket Kit 823106...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 823108
MOOSE RACING
$21.87A degraded exhaust gasket compromises both performance and reliability—allowing unburned gases to escape before the O2 sensors can register them, which throws off your air-fuel ratio and wastes horsepower. The MOOSE RACING Exhaust Gasket Kit 823108...09345307- SKU:
- 09345307
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
$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 buildup that degrades efficiency. MOOSE RACING's...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. MOOSE RACING's gasket kit delivers reliable sealing under...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 here in the U.S.A., engineered to handle the demands of...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 individual components while delivering OEM-quality...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 price tag, but Moose Racing delivers genuine-quality...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 Head Cover Gasket - Yamaha 819030
MOOSE RACING
$34.11A leaking valve cover gasket compromises engine sealing and can lead to oil seepage, increased maintenance costs, and potential engine damage. MOOSE RACING Head Cover Gaskets deliver OEM-equivalent performance at a fraction of the price, using high-tech...09346185- SKU:
- 09346185
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- VALVE COVER
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- GASKET
$34.11 -
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 MOOSE RACING Motor Seals kit consolidates all critical...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 genuine Kawasaki pricing, allowing you to complete a...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 you all the OEM-quality components needed to restore...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 sourcing individual components by delivering every...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 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 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 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 - 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 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
