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 Water Pump Rebuild Kit 821679
MOOSE RACING
$55.70A failing water pump can leave you stranded or cause catastrophic engine damage—and replacement isn't always practical or cost-effective. The MOOSE RACING Water Pump Rebuild Kit gives you everything...09345264- SKU:
- 09345264
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
$55.70 -
MOOSE RACING Exhaust Gasket Kit 823042
MOOSE RACING
$9.68A quality exhaust gasket kit is essential for maintaining a sealed exhaust system and preventing performance-robbing air leaks that compromise horsepower and fuel efficiency. MOOSE RACING's gasket...09345274- SKU:
- 09345274
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$9.68 -
MOOSE RACING Exhaust Gasket Kit 823076
MOOSE RACING
$8.13A quality exhaust gasket kit is essential for maintaining a sealed exhaust system and preventing leaks that compromise performance and create noise issues. MOOSE RACING's 823076 gasket kit delivers...09345291- SKU:
- 09345291
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- EXHAUST
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$8.13 -
MOOSE RACING Motor Gasket Kit with Seal - Husqvarna/KTM 811370
MOOSE RACING
$135.40A complete engine and transmission rebuild demands precision-fit gaskets and seals—and sourcing OEM-quality components separately becomes costly and time-consuming. This Moose Racing Motor Gasket Kit...09345366- SKU:
- 09345366
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$135.40 -
MOOSE RACING Exhaust Gasket Kit 823196
MOOSE RACING
$16.37A compromised exhaust seal can silently rob your engine of performance through gas leakage and heat loss—costing you horsepower you've paid for. The MOOSE RACING Exhaust Gasket Kit 823196 delivers...09346687- SKU:
- 09346687
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$16.37 -
MOOSE RACING Valve Shim - 7.48 x 1.35 - 5 pack MSE5PK748135
MOOSE RACING
$9.95Proper valve clearance is critical to engine performance and longevity, and having the right shims on hand eliminates guesswork during valve train maintenance. MOOSE RACING valve shims are forged...09261861- SKU:
- 09261861
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.35 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- ROLLED
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
$9.95 -
MOOSE RACING Ignition Cover Gasket 816193
MOOSE RACING
$11.93A leaking ignition cover gasket compromises engine sealing and can lead to oil loss and contamination. MOOSE RACING's OEM-equivalent replacement gasket delivers reliable sealing at a fraction of...09340971- SKU:
- 09340971
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
$11.93 -
MOOSE RACING Top End Gasket Kit - KX450 810469
MOOSE RACING
$78.88When you're rebuilding a KX450 top end, every gasket and seal matters—a single leak or improper fit can undermine your entire engine build. The MOOSE RACING Top End Gasket Kit eliminates guesswork by...09341001- SKU:
- 09341001
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$78.88 -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811478
MOOSE RACING
$81.65A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising here invites oil leaks, compression loss, and catastrophic failure. The MOOSE RACING Motor Gasket Kit...09341003- SKU:
- 09341003
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$81.65 -
MOOSE RACING Top End Gasket Kit - YZ450 810687
MOOSE RACING
$77.42A quality top-end gasket kit is essential when rebuilding a YZ450—worn seals and gaskets compromise compression, invite oil leaks, and undermine engine reliability. The MOOSE RACING Top End Gasket...09341005- SKU:
- 09341005
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$77.42 -
On Sale
VESRAH Exhaust Gasket VE-1002
VESRAH
MSRP: $11.95Now: $11.35Was: $11.95Exhaust leaks compromise both performance and longevity—a degraded gasket allows unmetered air into your exhaust system, throwing off fuel trim and losing power. The VESRAH VE-1002 delivers a...VX1002- SKU:
- VX1002
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 10 PACK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
MSRP: $11.95Now: $11.35Was: $11.95 -
On Sale
VESRAH Exhaust Gasket VE-1003
VESRAH
MSRP: $16.95Now: $16.10Was: $16.95Exhaust gasket failure leads to performance loss, increased emissions, and potential engine damage—making reliable sealing critical for any serious build. The VESRAH VE-1003 delivers consistent,...VX1003- SKU:
- VX1003
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- UNITS:
- 10 PACK
MSRP: $16.95Now: $16.10Was: $16.95 -
On Sale
VESRAH Exhaust Gasket VE-1005
VESRAH
MSRP: $35.21Now: $33.45Was: $35.21Exhaust leaks compromise horsepower, increase emissions, and create annoying drone under acceleration. The VESRAH VE-1005 exhaust gasket pack delivers the precise seal your exhaust manifold needs to...VX1005- SKU:
- VX1005
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- UNITS:
- 10 PACK
MSRP: $35.21Now: $33.45Was: $35.21 -
MOOSE RACING Head Cover Gasket - CRF450X 819159
MOOSE RACING
$8.72Head cover gaskets are critical sealing components that prevent oil leakage from your engine's valve cover—a failure here means mess, contamination, and potential engine damage. OEM replacements...09346570- SKU:
- 09346570
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
$8.72 -
MOOSE RACING Gasket - Top End - Honda 8100012
MOOSE RACING
$101.85Whether you're rebuilding after a top-end refresh or performing routine maintenance, a complete gasket set eliminates guesswork and ensures proper sealing across every critical junction. MOOSE RACING...09346571- SKU:
- 09346571
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$101.85 -
MOOSE RACING Clutch Cover Gasket 816056
MOOSE RACING
$21.13A leaking clutch cover gasket compromises engine sealing and can lead to oil loss, contamination, and premature wear. The MOOSE RACING Clutch Cover Gasket 816056 delivers OEM-equivalent sealing...09346575- SKU:
- 09346575
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$21.13 -
MOOSE RACING Head Cover Gasket - CRF250F 819198
MOOSE RACING
$20.15A leaking head cover gasket will compromise engine sealing and lead to oil seepage onto your engine bay. OEM replacement gaskets carry premium pricing, but Moose Racing delivers genuine...09346585- SKU:
- 09346585
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- UNITS:
- EACH
$20.15Qty in Cart: 0Quantity:Price:$20.15Subtotal: -
MOOSE RACING Head Cover Gasket - KTM/Husqvarna 819208
MOOSE RACING
$13.18Head cover gaskets are critical sealing components that prevent oil leakage from your engine's valve cover—a failure here means costly oil loss and potential engine damage. The MOOSE RACING Head...09346586- SKU:
- 09346586
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
$13.18 -
MOOSE RACING Clutch Cover Gasket 816346
MOOSE RACING
$14.45A leaking clutch cover gasket compromises engine sealing and can lead to oil loss during hard racing or spirited driving. The MOOSE RACING Clutch Cover Gasket 816346 delivers OEM-equivalent...09346589- SKU:
- 09346589
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$14.45Qty in Cart: 0Quantity:Price:$14.45Subtotal: -
MOOSE RACING Ignition Cover Gasket 816287
MOOSE RACING
$14.99A properly sealed ignition cover is critical to engine reliability—combustion heat and vibration will degrade a worn gasket, leading to oil seepage and potential ignition system failures. The MOOSE...09346142- SKU:
- 09346142
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$14.99
