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 Seals - CRF/XL/XR 80 822162
MOOSE RACING
$20.52Engine and transmission seals take a beating under load, and OEM replacements come with OEM pricing. MOOSE RACING Motor Seals deliver genuine OEM-quality reliability at a fraction of the cost, so you can confidently rebuild your CRF/XL/XR 80 without...M822162- SKU:
- M822162
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- UNITS:
- SET
$20.52 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 125SX/EXC 811304
MOOSE RACING
$90.04A complete engine and transmission rebuild demands gaskets and seals that fit precisely and hold up under pressure—OEM parts carry premium pricing, but this MOOSE RACING kit delivers genuine-quality components at a fraction of the cost. Whether you're...09340108- SKU:
- 09340108
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$90.04 -
MOOSE RACING Top End Gasket Kit - CR85R 810212
MOOSE RACING
$32.09A complete top-end rebuild demands precision components that won't compromise engine integrity or drain your budget. The MOOSE RACING Top End Gasket Kit eliminates the guesswork of sourcing individual seals and gaskets, delivering OEM-quality replacement...09340445- SKU:
- 09340445
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$32.09 -
MOOSE RACING Complete Motor Gasket Kit - CR85R 808212
MOOSE RACING
$58.40A complete engine rebuild demands precision gaskets and seals—and sourcing OEM-quality components shouldn't drain your budget. The MOOSE RACING Complete Motor Gasket Kit delivers genuine reliability at a fraction of OEM pricing, using high-tech materials...09340446- SKU:
- 09340446
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$58.40 -
MOOSE RACING Motor Gasket Kit with Seal - CR85R 811212
MOOSE RACING
$70.33A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work or wallet. MOOSE Racing delivers OEM-quality replacement seals at a fraction of factory pricing, so you can rebuild with confidence...09340447- SKU:
- 09340447
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$70.33 -
MOOSE RACING Top End Gasket Kit - CR125R 810239
MOOSE RACING
$48.17A top-end rebuild demands precision seals and gaskets that won't compromise engine integrity or bleed your budget. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of factory pricing, giving you the confidence to complete...09340448- SKU:
- 09340448
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$48.17 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811239
MOOSE RACING
$118.19A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent quality at a fraction of the cost, letting you rebuild with...09340450- SKU:
- 09340450
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$118.19 -
MOOSE RACING Top End Gasket Kit - CR125R 810243
MOOSE RACING
$49.60A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or your wallet. The MOOSE RACING Top End Gasket Kit gives you OEM-quality replacement seals and every gasket needed for a complete rebuild—all...09340451- SKU:
- 09340451
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$49.60 -
MOOSE RACING Motor Gasket Kit with Seal - CR125R 811243
MOOSE RACING
$119.57A complete engine and transmission rebuild demands precision seals and gaskets that match OEM specifications—and Moose Racing delivers exactly that at a fraction of genuine part costs. This comprehensive kit eliminates the guesswork of sourcing...09340453- SKU:
- 09340453
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$119.57 -
MOOSE RACING Motor Seals - RM250 822127
MOOSE RACING
$35.89Engine rebuilds demand precision—OEM-quality seals that won't compromise reliability or drain your budget. MOOSE RACING motor seals deliver genuine replacement performance at a fraction of OEM pricing, giving you the confidence to rebuild both engine and...M822127- SKU:
- M822127
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
$35.89 -
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
$22.96 -
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 - 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
