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 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 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 Crank Bearing - KTM 24-1099
MOOSE RACING
$39.95Worn crankshaft bearings are the silent killer of 2-stroke performance—they accelerate power loss, increase friction, and can lead to catastrophic engine failure if left unchecked. The MOOSE RACING...09240221- SKU:
- 09240221
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- TYPE:
- BALL
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.95 -
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 -
POWERSTANDS RACING Drain Plug 00-01948-22
POWERSTANDS RACING
$25.95A quality drain plug might seem like a small detail, but it's one of the most critical connections in your engine bay. The POWERSTANDS RACING Drain Plug keeps your oil sealed tight while the embedded...09200113- SKU:
- 09200113
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- ALUMINUM
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- DIAMETER - THREAD SIZE METRIC:
- M14 X 1.25
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95 -
WSM Piston Kit - Sea-Doo - +.5 mm 010-815-05K
WSM
$73.24Stock pistons are a compromise between cost and performance—but your Sea-Doo engine deserves better. WSM Piston Kits deliver OEM-equivalent quality with measurable gains in durability and power...01081505- SKU:
- 01081505
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE:
- +0,50 MM
- MODEL:
- ORIGINAL
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- BORE SIZE METRIC:
- 76.00 MM
$73.24 -
MOOSE RACING Washer/Snap Ring Counter Shaft 25-6006
MOOSE RACING
$31.95Front sprocket replacements demand precision assembly, and overlooking the countershaft fasteners can compromise your drivetrain's integrity and longevity. The MOOSE RACING Washer/Snap Ring Counter...09350488- SKU:
- 09350488
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- WASHER
- UNITS:
- 10 PACK
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
$31.95 -
MOOSE RACING Countershaft Sprocket Seal Kit - KDX 25-4036
MOOSE RACING
$29.95A worn countershaft sprocket seal is a common failure point that leads to oil leakage, contamination, and premature bearing wear. The MOOSE RACING Countershaft Sprocket Seal Kit delivers a complete...09350841- SKU:
- 09350841
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$29.95 -
MOOSE RACING Water Pump Rebuild Kit 821585
MOOSE RACING
$76.89A failing water pump doesn't just compromise cooling efficiency—it risks catastrophic engine damage and race-ending downtime. The MOOSE RACING Water Pump Rebuild Kit 821585 gives you everything...09345245- SKU:
- 09345245
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- REPAIR KIT
$76.89 -
MOOSE RACING Exhaust Gasket Kit 823148
MOOSE RACING
$21.87A quality exhaust gasket kit is critical to maintaining a sealed exhaust system—preventing exhaust leaks that reduce performance and create noise. MOOSE RACING's 823148 kit ensures proper sealing at...09345330- SKU:
- 09345330
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
$21.87 -
MOOSE RACING Exhaust Gasket Kit 823149
MOOSE RACING
$21.87A leaking exhaust gasket doesn't just waste horsepower—it compromises engine sealing, invites exhaust leaks, and can lead to costly damage if left unaddressed. The MOOSE RACING Exhaust Gasket Kit...09345331- SKU:
- 09345331
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$21.87 -
MOOSE RACING Exhaust Gasket Kit 823049
MOOSE RACING
$8.13A properly sealed exhaust system is critical to engine performance and longevity—leaks rob you of power, introduce unwanted noise, and allow exhaust gases to escape before your turbo or headers can...09345275- SKU:
- 09345275
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823104
MOOSE RACING
$21.48A failed exhaust gasket compromises both performance and reliability, allowing exhaust gases to escape before they reach your system and creating harmful air leaks. MOOSE RACING's Exhaust Gasket Kit...09345303- SKU:
- 09345303
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
$21.48
