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 Carb Mid Body Gasket Kit 26-1512
MOOSE RACING
$28.95FCR carburetors demand precision sealing to maintain fuel atomization and consistent jetting across your powerband. Over time, factory gaskets and O-rings degrade, leading to fuel seepage, tuning...09351011- SKU:
- 09351011
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- CARBURETOR
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$28.95 -
MOOSE RACING Carb Mid Body Gasket Kit 26-1511
MOOSE RACING
$26.95Carburetor mid-body gasket failure leads to fuel leaks, inconsistent jetting, and unpredictable performance on the track or trail. The MOOSE RACING Carb Mid Body Gasket Kit 26-1511 provides all...09351012- SKU:
- 09351012
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CARBURETOR
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$26.95 -
MOOSE RACING Water Pump Rebuild Kit 821407
MOOSE RACING
$45.89A failing water pump can quickly become a catastrophic engine failure, leaving you stranded and facing costly repairs. This MOOSE RACING rebuild kit gives you everything needed to restore your water...09345213- SKU:
- 09345213
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$45.89 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1009
MOOSE RACING
$93.95A worn crankshaft bearing or degraded seal will accelerate internal engine wear and compromise power delivery—especially critical for 2-stroke engines where lubrication tolerance is razor-thin. The...A241009- SKU:
- A241009
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$93.95 -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1014
MOOSE RACING
$69.95Your crankshaft bearings are the foundation of engine reliability—worn or inadequate bearings lead to excessive play, bearing knock, and catastrophic engine failure. The MOOSE RACING Crankcase...A241014- SKU:
- A241014
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$69.95 -
MOOSE RACING Crank Bearing GAS EC 24-1118
MOOSE RACING
$89.95Crankshaft bearing failure is one of the quickest ways to end a race day—or destroy an engine. The MOOSE RACING Crank Bearing GAS EC 24-1118 delivers precision-engineered bearings with fluorocarbon...09240603- SKU:
- 09240603
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- RIDING STYLE:
- STREET
$89.95 -
MOOSE RACING Countershaft Sprocket Seal Kit - Kawasaki 25-4046
MOOSE RACING
$27.95A worn countershaft sprocket seal compromises engine performance and accelerates drivetrain wear on your Kawasaki. This MOOSE RACING kit delivers OEM-quality sealing with upgraded components...09351166- SKU:
- 09351166
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- COUNTERSHAFT
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$27.95 -
MOOSE RACING Carb Mid Body Gasket Kit 26-10014
MOOSE RACING
$18.95Carburetor sealing degradation compromises fuel atomization and creates lean-running conditions that tank performance and reliability. This complete gasket and O-ring kit restores FCR carb integrity...09351169- SKU:
- 09351169
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CARBURETOR
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$18.95 -
MOOSE RACING Magnetic Drain Plug DP127
MOOSE RACING
$23.95Metal particles naturally accumulate in your engine oil during normal operation—wear debris that can accelerate bearing damage and reduce engine longevity. The MOOSE RACING Magnetic Drain Plug DP127...09200054- SKU:
- 09200054
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DIAMETER - THREAD SIZE METRIC:
- M14 X 1.50 X 13 MM
- FEATURES:
- MAGNETIC
- MATERIAL:
- 7075 ALUMINUM
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRAIN
$23.95 -
MOOSE RACING Slave Cylinder Rebuild Kit 18-6003
MOOSE RACING
$34.95A leaking slave cylinder compromises braking feel and can leave you stranded trackside or roadside. This MOOSE RACING rebuild kit restores your hydraulic clutch or brake system to factory...09500762- SKU:
- 09500762
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- SLAVE CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$34.95 -
MOOSE RACING Slave Cylinder Rebuild Kit 18-6014
MOOSE RACING
$72.95A leaking slave cylinder compromises brake feel and can leave you stranded trackside or on the street. This MOOSE RACING rebuild kit supplies all necessary seals, O-rings, and hardware to restore...09500899- SKU:
- 09500899
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- SLAVE CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
$72.95 -
MOOSE RACING Slave Cylinder Rebuild Kit 18-6015
MOOSE RACING
$73.95Slave cylinder leaks compromise braking performance and safety—this rebuild kit gets your hydraulic system back to OEM specifications without replacing the entire cylinder. Whether you're running a...09500900- SKU:
- 09500900
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- SLAVE CYLINDER
$73.95 -
MOOSE RACING Valve Shim - 7.48 x 1.65 - 5 pack MSE5PK748165
MOOSE RACING
$9.95Precision valve shim sets are essential for maintaining proper valve clearance and preventing costly valve train damage during high-performance operation. These MOOSE RACING shims eliminate guesswork...09261867- SKU:
- 09261867
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ATV
- VALVE SHIM THICKNESS METRIC:
- 1.65 MM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
$9.95 -
MOOSE RACING Top End Gasket - CRF230 810242
MOOSE RACING
$74.59A top-end rebuild demands precision gaskets and seals that won't fail under load—this Moose Racing set gives you OEM-quality components at a fraction of the cost. Whether you're replacing a worn...09340070- SKU:
- 09340070
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$74.59 -
On Sale
VESRAH Intake Valve GG-2013-IN
VESRAH
MSRP: $12.83Now: $12.19Was: $12.83Maintaining OEM-equivalent valve performance is critical for engine reliability and consistent combustion efficiency. The VESRAH Intake Valve GG-2013-IN is precision-manufactured to match factory...GG2013IN- SKU:
- GG2013IN
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- LENGTH METRIC:
- 93.80 MM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STEM DIAMETER METRIC:
- 6.00 MM
- HEAD DIAMETER:
- 34,00 MM
- HEAD DIAMETER METRIC:
- 34.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
MSRP: $12.83Now: $12.19Was: $12.83 -
On Sale
VESRAH Intake Valve GG-1040-IN
VESRAH
MSRP: $27.00Now: $25.65Was: $27.00A worn or damaged intake valve compromises combustion efficiency, throttle response, and fuel economy—potentially leading to costly engine damage if left unchecked. The VESRAH Intake Valve GG-1040-IN...09262806- SKU:
- 09262806
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- HEAD DIAMETER METRIC:
- 28.50 MM
- LENGTH METRIC:
- 96.60 MM
- PRODUCT NAME:
- VALVE
- STEM DIAMETER METRIC:
- 5.50 MM
- APPLICATION:
- INTAKE
- HEAD DIAMETER:
- 28,50 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 2 PIECE
MSRP: $27.00Now: $25.65Was: $27.00 -
POWERSTANDS RACING Cam Chain Tensioner - MX GM 03-02008-29
POWERSTANDS RACING
$74.95A worn or inconsistent cam chain tensioner can throw your timing off and accelerate internal engine damage—especially under high RPM conditions. The POWERSTANDS RACING Cam Chain Tensioner eliminates...09251258- SKU:
- 09251258
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- CAM CHAIN TENSIONER
- RIDING STYLE:
- STREET
$74.95 -
POWERSTANDS RACING Drain Plug 00-01943-22
POWERSTANDS RACING
$25.95Drain plugs are a critical point of failure in high-performance engines—a loose or stripped plug can mean catastrophic oil loss and engine seizure. The POWERSTANDS RACING Drain Plug eliminates...09200102- SKU:
- 09200102
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- DIAMETER - THREAD SIZE METRIC:
- M8 X 1.50 X 17 MM
- FEATURES:
- MAGNETIC
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
$25.95 -
POWERSTANDS RACING Drain Plug 00-01945-22
POWERSTANDS RACING
$25.95A quality drain plug is fundamental to proper engine maintenance—it's where contaminated oil leaves your engine, so it needs to stay secure and sealed. The POWERSTANDS RACING Drain Plug eliminates...09200105- SKU:
- 09200105
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- FEATURES:
- MAGNETIC
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- DIAMETER - THREAD SIZE METRIC:
- M12 X 1.25 X 17 MM
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$25.95 -
POWERSTANDS RACING Drain Plug 00-01945-25
POWERSTANDS RACING
$25.95Engine oil drain plugs endure extreme heat and pressure cycles that can cause standard fasteners to loosen or seize. The POWERSTANDS RACING Drain Plug eliminates this risk with a CNC-machined...09200106- SKU:
- 09200106
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- MAGNETIC
- MATERIAL:
- ALUMINUM
- TYPE:
- OIL DRAIN
- DIAMETER - THREAD SIZE METRIC:
- M12 X 1.25 X 17 MM
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95
