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
-
MOOSE RACING Complete Gasket Set - Suzuki 808590
MOOSE RACING
$109.72A complete gasket set is essential for maintaining proper engine sealing and preventing fluid leaks across critical engine surfaces. Whether you're rebuilding after a top-end refresh or performing routine engine maintenance, MOOSE RACING's...09346949- SKU:
- 09346949
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$109.72 -
MOOSE RACING Complete Gasket Set - Suzuki 808592
MOOSE RACING
$93.43A complete gasket set is the foundation of engine reliability—sealing critical surfaces to prevent oil leaks, coolant loss, and combustion gas escape that compromise performance and longevity. Whether you're rebuilding after high-mileage wear or...09346950- SKU:
- 09346950
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET SET
$93.43 -
MOOSE RACING Complete Gasket Set - Suzuki 808983
MOOSE RACING
$146.11A complete gasket set is essential insurance against catastrophic engine failure—worn or compromised gaskets lead to oil leaks, coolant seepage, and combustion blow-by that compromise performance and reliability. MOOSE RACING's OEM-quality gasket set...09346951- SKU:
- 09346951
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$146.11 -
MOOSE RACING Top End Gasket Set - Suzuki DRZ 810588
MOOSE RACING
$43.80A top-end gasket set is essential for maintaining compression and preventing oil leakage in your DRZ engine. Whether you're rebuilding after high-mileage wear or performing routine maintenance, MOOSE RACING gaskets ensure reliable sealing under demanding...09346952- SKU:
- 09346952
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
$43.80 -
MOOSE RACING Gasket Set with Seals - Suzuki 811588
MOOSE RACING
$105.55Engine gasket degradation is one of the most common sources of oil leaks, coolant seepage, and performance loss in high-mileage engines. A complete gasket set with OEM-quality seals ensures a proper compression chamber, prevents fluid loss, and maintains...09346955- SKU:
- 09346955
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
$105.55 -
MOOSE RACING Gasket Set with Seals - Suzuki 811592
MOOSE RACING
$113.95A complete gasket and seal set is essential for maintaining critical engine compression and preventing fluid leaks at every junction in your engine block. MOOSE RACING's precision-engineered gasket set ensures proper sealing across all contact points,...09346956- SKU:
- 09346956
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
$113.95 -
MOOSE RACING Gasket Clutch Inner - Suzuki 816032
MOOSE RACING
$13.26A worn or damaged clutch gasket compromises your entire clutch assembly's integrity, leading to fluid leaks, slippage, and potential catastrophic failure on the track or trail. The MOOSE RACING Gasket Clutch Inner delivers OEM-equivalent sealing...09346957- SKU:
- 09346957
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH INNER
- RIDING STYLE:
- STREET
$13.26 -
MOOSE RACING Gasket Clutch Inner - KTM 816055
MOOSE RACING
$11.00A worn or damaged clutch gasket compromises your KTM's seal integrity, leading to fluid leakage and inconsistent clutch engagement during high-load riding. The MOOSE RACING Gasket Clutch Inner delivers OEM-equivalent sealing performance with proven...09346958- SKU:
- 09346958
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH INNER
$11.00 -
MOOSE RACING Valve Shim - 10.0 x 2.30 - 5 pack MSE5PK1000230
MOOSE RACING
$10.95Precision valve train maintenance demands reliable shims you can identify at a glance—and trust under load. These MOOSE RACING valve shims eliminate guesswork with laser-etched sizing, so you spend less time sorting and more time building. Forged from...09261839- SKU:
- 09261839
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 2.30 MM
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- RIDING STYLE:
- ATV
$10.95 -
MOOSE RACING Valve Shim - 10.0 x 2.45 - 5 pack MSE5PK1000245
MOOSE RACING
$10.95Precision valve train maintenance demands reliable, durable shims that won't let you down mid-rebuild. These MOOSE RACING valve shims are forged from 4140 cold rolled steel—not sintered—giving you superior strength and consistency across your entire...09261842- SKU:
- 09261842
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- ROLLED
- RIDING STYLE:
- ATV
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.45 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$10.95 -
MOOSE RACING Valve Shim - 10.0 x 2.55 - 5 pack MSE5PK1000255
MOOSE RACING
$10.95Maintaining precise valve clearances is critical for engine performance and longevity, and having quality shims on hand eliminates downtime during valve train service. MOOSE Racing's forged 4140 steel shims deliver the durability and accuracy you need...09261844- SKU:
- 09261844
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 2.55 MM
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
$10.95 -
MOOSE RACING Valve Shim - 10.0 x 2.60 - 5 pack MSE5PK1000260
MOOSE RACING
$10.95Proper valve shim sizing is critical to maintaining precise valve clearances and engine performance—improper clearances lead to valve float, reduced power delivery, and accelerated wear on your valve train. These MOOSE RACING shims give you the exact...09261845- SKU:
- 09261845
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.60 MM
- RIDING STYLE:
- WATERCRAFT
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
$10.95 -
MOOSE RACING Valve Shim - 10.0 x 2.65 - 5 pack MSE5PK1000265
MOOSE RACING
$10.95Maintaining precise valve clearances is critical to engine performance and longevity—and having quality shims on hand eliminates guesswork during valve train service. MOOSE Racing valve shims are forged from 4140 cold rolled steel, offering superior...09261846- SKU:
- 09261846
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- MATERIAL:
- ROLLED
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 2.65 MM
$10.95 -
MOOSE RACING Valve Shim - 7.48 x 1.30 - 5 pack MSE5PK748130
MOOSE RACING
$9.95Maintaining proper valve clearance is critical to engine performance and longevity—even small deviations can cause valve float, increased wear, and lost power. MOOSE Racing valve shims give you the precision tools to dial in your valve train quickly and...09261860- SKU:
- 09261860
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 1.30 MM
$9.95 -
MOOSE RACING Motor Gasket Kit with Seal - RM250 811582
MOOSE RACING
$102.83A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work—OEM replacements from reputable manufacturers are essential, not optional. This MOOSE RACING kit eliminates the frustration of sourcing...M811582- SKU:
- M811582
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$102.83 -
MOOSE RACING Ignition Cover Gasket 817675
MOOSE RACING
$7.01A failing ignition cover gasket will compromise engine sealing and invite oil leakage—costly problems that compound quickly if left unchecked. The MOOSE RACING 817675 delivers OEM-equivalent durability at a fraction of dealership pricing, making it the...M817675- SKU:
- M817675
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$7.01 -
MOOSE RACING Clutch Cover Gasket 817685
MOOSE RACING
$6.11A leaking clutch cover gasket compromises engine sealing integrity and creates mess on your shop floor. The MOOSE RACING 817685 delivers OEM-equivalent performance at a fraction of OEM pricing, using high-tech materials engineered for precision fitment...M817685- SKU:
- M817685
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$6.11 -
MOOSE RACING Clutch Cover Gasket 817690
MOOSE RACING
$10.21A leaking clutch cover gasket compromises engine sealing and can lead to oil seepage that affects performance and reliability. This Moose Racing replacement gasket restores OEM-level integrity at a fraction of OEM pricing, using high-tech materials...M817690- SKU:
- M817690
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$10.21 -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husqvarna 808365
MOOSE RACING
$130.03A complete engine and transmission rebuild demands precision gaskets and seals that match OEM specifications without the OEM price tag. The MOOSE RACING Complete Motor Gasket Kit delivers all the components you need—gaskets, o-rings, and valve...09344778- SKU:
- 09344778
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$130.03 -
MOOSE RACING Complete Motor Gasket Kit - CRF100/XR100 808221
MOOSE RACING
$74.51A complete engine rebuild demands precision seals and gaskets that won't fail under load. This MOOSE RACING kit eliminates the guesswork of sourcing individual components—every gasket, o-ring, and seal you need for a full CRF100/XR100 engine and...M808221- SKU:
- M808221
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$74.51
