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 Valve Shim - 9.48 x 1.85 - 5 pack MSE5PK948185
MOOSE RACING
$9.95Valve shim maintenance is critical to proper engine tuning and longevity—getting the right sizes on hand eliminates guesswork during valve adjustments. MOOSE RACING's forged 4140 steel shims are...09261941- SKU:
- 09261941
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.85 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
$9.95 -
MOOSE RACING Valve Shim - 9.48 x 2.00 - 5 pack MSE5PK948200
MOOSE RACING
$9.95Precision valve train maintenance demands reliable, accurately-sized shims that won't fail under load. MOOSE RACING valve shims are forged from 4140 cold rolled steel—not sintered—ensuring consistent...09261944- SKU:
- 09261944
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.00 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
$9.95 -
MOOSE RACING Valve Shim - 9.48 x 2.05 - 5 pack MSE5PK948205
MOOSE RACING
$9.95Maintaining precise valve clearances is critical to engine performance and longevity, and having quality shims on hand eliminates downtime during routine valve train service. These MOOSE Racing shims...09261945- SKU:
- 09261945
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.05 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- RIDING STYLE:
- ATV
$9.95 -
MOOSE RACING Valve Shim - 9.48 x 2.20 - 5 pack MSE5PK948220
MOOSE RACING
$9.95Proper valve train geometry is critical to engine performance and longevity, and worn or incorrect shim sizes will compromise both. This 5-pack of MOOSE RACING valve shims gives you the precision...09261948- SKU:
- 09261948
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- VALVE SHIM THICKNESS METRIC:
- 2.20 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
$9.95 -
MOOSE RACING Valve Shim - 9.48 x 2.50 - 5 pack MSE5PK948250
MOOSE RACING
$9.95Precision valve train maintenance demands reliable, accurately-sized shims that won't fail under load. This MOOSE RACING 5-pack gives you multiple shims of the same dimension, eliminating the...09261954- SKU:
- 09261954
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- VALVE SHIM THICKNESS METRIC:
- 2.50 MM
- MATERIAL:
- ROLLED
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
MOOSE RACING Valve Shim - 9.48 x 2.70 - 5 pack MSE5PK948270
MOOSE RACING
$9.95Valve shim maintenance is critical to engine longevity and performance—incorrect clearances lead to valve float, poor combustion, and catastrophic damage. These MOOSE RACING shims give you precise...09261958- SKU:
- 09261958
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 2.70 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- RIDING STYLE:
- OFF-ROAD
$9.95 -
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...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...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...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...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 Top End Gasket Set - Suzuki DR 350 SE 810592
MOOSE RACING
$55.47A top-end gasket set is critical for maintaining compression integrity and preventing coolant or oil seepage in your DR 350 SE's cylinder head. Factory gaskets degrade over time, and reusing them...09346953- SKU:
- 09346953
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$55.47Qty in Cart: 0Quantity:Price:$55.47Subtotal: -
MOOSE RACING Gasket Set with Seals - Suzuki/Kawasaki 811531
MOOSE RACING
$88.62A complete gasket and seal set is essential for maintaining compression integrity and preventing fluid leaks across critical engine junction points. Whether you're rebuilding after significant...09346954- SKU:
- 09346954
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
$88.62 -
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...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...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...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...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 Gasket Clutch Inner - Suzuki 816168
MOOSE RACING
$17.35A worn or compromised clutch inner gasket compromises the integrity of your clutch assembly, leading to fluid seepage, slipping engagement, and reduced power transfer to the wheels. The MOOSE RACING...09346959- SKU:
- 09346959
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- CLUTCH INNER
$17.35Qty in Cart: 0Quantity:Price:$17.35Subtotal: -
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...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 2.35 - 5 pack MSE5PK1000235
MOOSE RACING
$10.95Precision valve train maintenance demands reliability, and these MOOSE RACING shims deliver exactly that. Forged from 4140 cold-rolled steel rather than sintered material, they resist deformation...09261840- SKU:
- 09261840
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- ATV
- VALVE SHIM THICKNESS METRIC:
- 2.35 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
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...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
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal:
