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 Complete Motor Gasket Kit - KTM/Husqvarna 808340
MOOSE RACING
$73.12A complete engine and transmission rebuild demands gaskets and seals that match OEM precision without the OEM price tag. This MOOSE RACING kit eliminates multiple part orders by consolidating everything you need into one comprehensive set, letting you...09345353- SKU:
- 09345353
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$73.12 -
MOOSE RACING Valve Shim - 7.48 x 2.60 - 5 pack MSE5PK748260
MOOSE RACING
$9.95Precise valve shim selection is critical for maintaining proper valve train clearance and engine performance across multiple service intervals. These forged 4140 steel shims eliminate guesswork with laser-etched sizing, allowing you to quickly identify...09261886- SKU:
- 09261886
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.60 MM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$9.95 -
MOOSE RACING Valve Shim - 7.48 x 2.65 - 5 pack MSE5PK748265
MOOSE RACING
$9.95Proper valve shim selection is critical for maintaining precise valve clearance and preventing costly engine damage from improper adjustment. These MOOSE RACING shims eliminate guesswork during valve train service by providing individually marked,...09261887- SKU:
- 09261887
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- ROLLED
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.65 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
$9.95 -
MOOSE RACING Water Pump Rebuild Kit 821428
MOOSE RACING
$54.04A failing water pump can sideline your engine when you need it most. This complete MOOSE RACING rebuild kit supplies every seal, gasket, and bearing required to restore your water pump to factory specifications—eliminating leaks and restoring proper...09345217- SKU:
- 09345217
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- WATER PUMP
$54.04Qty in Cart: 0Quantity:Price:$54.04Subtotal: -
MOOSE RACING Water Pump Rebuild Kit 821429
MOOSE RACING
$48.46A failing water pump compromises your entire cooling system and risks catastrophic engine damage on the track or street. This MOOSE RACING rebuild kit supplies every precision component needed to restore your pump to factory specifications—bearings,...09345218- SKU:
- 09345218
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$48.46 -
MOOSE RACING Water Pump Rebuild Kit 821430
MOOSE RACING
$50.65A failing water pump can sideline your engine before you know it, leading to overheating, catastrophic damage, and expensive downtime. Rather than replacing the entire assembly, the MOOSE RACING Water Pump Rebuild Kit 821430 gives you a complete...09345219- SKU:
- 09345219
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
$50.65 -
MOOSE RACING Water Pump Rebuild Kit 821470
MOOSE RACING
$46.27A failing water pump can leave you stranded—or worse, cost you a race. This MOOSE RACING rebuild kit gives you everything needed to restore your water pump to OEM specifications without replacing the entire assembly, saving time and money while...09345229- SKU:
- 09345229
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$46.27 -
MOOSE RACING Water Pump Rebuild Kit 821478
MOOSE RACING
$48.69A failing water pump can sideline your engine and derail race day. This MOOSE RACING rebuild kit gives you every gasket, seal, bearing, and snap ring needed to restore your pump to OEM specifications without the cost of a full replacement. Whether you're...09345230- SKU:
- 09345230
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$48.69 -
MOOSE RACING Water Pump Rebuild Kit 821481
MOOSE RACING
$49.36A failing water pump doesn't just risk engine overheating—it can leave you stranded mid-race or mid-project. The MOOSE RACING Water Pump Rebuild Kit 821481 delivers every critical component needed to restore your pump to OEM performance specifications...09345231- SKU:
- 09345231
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$49.36 -
MOOSE RACING Water Pump Rebuild Kit 821504
MOOSE RACING
$36.07A failing water pump can quickly become catastrophic—coolant leaks compromise engine temperature regulation, leading to overheating, blown head gaskets, and thousands in damage. This MOOSE RACING rebuild kit gives you everything needed to restore your...09345235- SKU:
- 09345235
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$36.07 -
MOOSE RACING Water Pump Rebuild Kit 821505
MOOSE RACING
$34.28A failing water pump compromises engine cooling efficiency and risks catastrophic overheating—especially under racing conditions or sustained high-performance driving. This complete rebuild kit restores your water pump to OEM specifications without the...09345236- SKU:
- 09345236
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$34.28 -
MOOSE RACING Water Pump Rebuild Kit 821547
MOOSE RACING
$53.51A failing water pump doesn't just compromise cooling efficiency—it can leave you stranded mid-race or mid-project. This MOOSE RACING rebuild kit gives you everything needed to restore your water pump to OEM specifications without the cost of a complete...09345238- SKU:
- 09345238
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$53.51 -
MOOSE RACING Exhaust Gasket Kit 823053
MOOSE RACING
$8.13Exhaust leaks rob your engine of horsepower and create annoying noise that distracts from performance. A quality gasket kit seals your exhaust manifold and pipe connections, ensuring every bit of combustion energy flows through your system unimpeded...09345278- SKU:
- 09345278
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET KIT
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823055
MOOSE RACING
$8.13A compromised exhaust gasket kit is one of the easiest ways to lose power, increase emissions, and invite costly engine damage down the line. MOOSE RACING's 823055 gasket kit delivers OEM-grade sealing reliability with the durability professionals...09345279- SKU:
- 09345279
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823062
MOOSE RACING
$8.13A worn or damaged exhaust gasket leads to costly exhaust leaks, increased emissions, and loss of horsepower—problems that compound over time. The MOOSE RACING Exhaust Gasket Kit 823062 provides OEM-quality sealing that eliminates leaks at the source,...09345281- SKU:
- 09345281
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823064
MOOSE RACING
$8.13A compromised exhaust gasket can lead to exhaust leaks, power loss, and failed emissions tests—all issues that compromise both performance and reliability. MOOSE RACING's Exhaust Gasket Kit 823064 delivers OEM-quality sealing with the durability you need...09345282- SKU:
- 09345282
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823065
MOOSE RACING
$8.13A failing exhaust gasket compromises both performance and reliability—allowing exhaust gases to escape before reaching your system, reducing power output and creating diagnostic headaches. MOOSE RACING's Exhaust Gasket Kit 823065 delivers OEM-quality...09345283- SKU:
- 09345283
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823068
MOOSE RACING
$8.13MOOSE RACING Exhaust Gasket Kit09345285- SKU:
- 09345285
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823069
MOOSE RACING
$8.13MOOSE RACING Exhaust Gasket Kit09345286- SKU:
- 09345286
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET KIT
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823072
MOOSE RACING
$8.13A reliable exhaust gasket kit is essential to maintaining a proper seal between your exhaust manifold and cylinder head—preventing exhaust leaks that rob horsepower, increase noise, and allow unburned gases to escape. The MOOSE RACING Exhaust Gasket Kit...09345288- SKU:
- 09345288
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$8.13Qty in Cart: 0Quantity:Price:$8.13Subtotal:
