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 Motor Gasket Kit with Seal - KX85 811419
MOOSE RACING
$74.56A complete engine and transmission rebuild demands precision—mismatched or degraded gaskets and seals will compromise compression, invite oil leakage, and undermine your reliability on the track or trail. The MOOSE RACING Motor Gasket Kit eliminates the...09341264- SKU:
- 09341264
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$74.56 -
MOOSE RACING Clutch Cover Gasket 816198
MOOSE RACING
$22.96A leaking clutch cover gasket compromises engine sealing integrity and invites oil contamination into critical drivetrain components. The MOOSE RACING Clutch Cover Gasket 816198 delivers OEM-equivalent sealing performance at a fraction of OEM pricing,...09341265- SKU:
- 09341265
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$22.96Qty in Cart: 0Quantity:Price:$22.96Subtotal: -
MOOSE RACING Ignition Cover Gasket 816199
MOOSE RACING
$21.61A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that damages surrounding components. The MOOSE RACING 816199 delivers OEM-equivalent sealing performance at a fraction of the cost, making it the smart choice for...09341266- SKU:
- 09341266
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$21.61Qty in Cart: 0Quantity:Price:$21.61Subtotal: -
MOOSE RACING Magnetic Drain Plug 33-DP101
MOOSE RACING
$19.95Metal debris circulating through your engine is a silent threat to bearing wear and premature failure. A magnetic drain plug captures ferrous particles during each oil change, giving you early warning of internal wear before catastrophic damage occurs...M0101- SKU:
- M0101
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- FEATURES:
- MAGNETIC
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRAIN
- DIAMETER - THREAD SIZE METRIC:
- M12 X 1.25
- PRODUCT NAME:
- PLUG
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
$19.95 -
MOOSE RACING Water Pump Rebuild Kit 821244
MOOSE RACING
$47.89A failing water pump can compromise your engine's thermal management and leave you stranded on track or trail. This complete MOOSE RACING rebuild kit supplies every seal, bearing, and gasket required to restore your water pump to factory specifications...09345183- SKU:
- 09345183
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$47.89 -
MOOSE RACING Motor Seals - Honda 822212
MOOSE RACING
$27.13Engine gaskets and seals degrade over time, leading to oil leaks, contamination, and catastrophic internal damage. MOOSE RACING Motor Seals deliver OEM-equivalent reliability at a fraction of dealership pricing, letting you rebuild with confidence. This...09340156- SKU:
- 09340156
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- SET
$27.13 -
MOOSE RACING Motor Seals - KX125 822183
MOOSE RACING
$33.29A complete engine seal failure can sideline your KX125 indefinitely—and sourcing individual OEM seals becomes expensive fast. The MOOSE RACING Motor Seals kit eliminates guesswork by delivering every crankshaft and engine seal you need for a full rebuild...09340162- SKU:
- 09340162
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- TYPE:
- OIL
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$33.29 -
MOOSE RACING Motor Seals - KLX/DRZ400 822193
MOOSE RACING
$35.24Engine seals are critical to maintaining oil pressure and preventing leakage during high-stress operation—factory seals degrade over time and can compromise your rebuild investment. MOOSE Racing Motor Seals deliver OEM-equivalent performance at a...09340163- SKU:
- 09340163
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$35.24 -
MOOSE RACING Motor Seals - 65 SX/XC 822185
MOOSE RACING
$35.24Engine and transmission seals wear out—and OEM replacements can drain your budget fast. MOOSE RACING Motor Seals deliver genuine OEM-equivalent reliability at a fraction of the cost, so you can rebuild your 65 SX/XC with confidence. Each set is...09340164- SKU:
- 09340164
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$35.24 -
MOOSE RACING Motor Seals - KTM/Husqvarna 822187
MOOSE RACING
$35.24OEM-quality engine and transmission seals don't have to cost OEM prices. MOOSE Racing Motor Seals deliver the precision fit and material reliability you need for a bulletproof rebuild, without the premium markup. Whether you're refreshing a two-stroke or...09340166- SKU:
- 09340166
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
$35.24 -
MOOSE RACING Motor Seals - 250 EXC/MXC/SXS/SX 822190
MOOSE RACING
$40.76Engine seal failure can compromise compression, increase oil consumption, and lead to costly internal damage—especially on high-demand two-stroke builds. MOOSE Racing Motor Seals deliver OEM-equivalent reliability at a fraction of the cost, using...09340167- SKU:
- 09340167
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
$40.76Qty in Cart: 0Quantity:Price:$40.76Subtotal: -
MOOSE RACING Motor Seals - Big Wheel/PW 80 822197
MOOSE RACING
$28.47A complete motor seal kit is critical for rebuilding an engine that runs reliably without oil leaks and internal contamination. OEM replacement seals can cost significantly more, but Moose Racing delivers genuine-quality gaskets and seals at a fraction...09340172- SKU:
- 09340172
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
$28.47 -
MOOSE RACING Clutch Cover Gasket 816079
MOOSE RACING
$12.38A failing clutch cover gasket compromises engine sealing and invites oil leakage that can damage adjacent components and reduce performance reliability. The MOOSE RACING Clutch Cover Gasket 816079 delivers OEM-equivalent sealing without the OEM price...09340564- SKU:
- 09340564
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$12.38 -
MOOSE RACING Complete Motor Gasket Kit - KTM 400/450 808317
MOOSE RACING
$140.21A complete engine rebuild demands precision gaskets and seals that won't compromise your work or fail under load. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of sourcing individual components while delivering OEM-quality...09340622- SKU:
- 09340622
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$140.21 -
MOOSE RACING Complete Motor Gasket Kit - KTM 808318
MOOSE RACING
$172.14A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under load. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of dealership pricing, giving you the confidence to...09340623- SKU:
- 09340623
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$172.14Qty in Cart: 0Quantity:Price:$172.14Subtotal: -
MOOSE RACING Top End Gasket Kit - KTM 810318
MOOSE RACING
$91.75A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit eliminates the guesswork—every component you need is included and engineered to OEM specifications, so...09340628- SKU:
- 09340628
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$91.75Qty in Cart: 0Quantity:Price:$91.75Subtotal: -
MOOSE RACING Top End Gasket Kit - TTR/XT 810643
MOOSE RACING
$53.03A top-end rebuild demands precision-matched components—and OEM gasket kits carry premium pricing that doesn't reflect the actual material cost. The MOOSE RACING Top End Gasket Kit delivers genuine OEM-quality seals and U.S.-manufactured gaskets at a...09340629- SKU:
- 09340629
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$53.03 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811317
MOOSE RACING
$165.87A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—or your wallet. MOOSE Racing delivers OEM-quality components at a fraction of dealership pricing, so you can rebuild with confidence knowing...09340631- SKU:
- 09340631
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
$165.87Qty in Cart: 0Quantity:Price:$165.87Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811318
MOOSE RACING
$194.00A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your budget. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent performance at a fraction of the cost, giving you the confidence to...09340632- SKU:
- 09340632
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
$194.00 -
MOOSE RACING Motor Gasket Kit without Seal - TTR 811643
MOOSE RACING
$107.75Engine and transmission rebuilds demand precision components that won't compromise reliability or drain your budget. MOOSE RACING's Motor Gasket Kit delivers OEM-equivalent sealing performance at a fraction of OEM pricing, allowing you to rebuild with...09340634- SKU:
- 09340634
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
$107.75
