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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VESRAH Intake Valve GG-1050-IN
VESRAH
$31.17Intake valves are critical to your engine's breathing efficiency and combustion reliability. The VESRAH GG-1050-IN delivers OEM-equivalent precision at a competitive price point, making it an ideal choice for rebuilds, race engine assembly, or...09260314- SKU:
- 09260314
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- LENGTH METRIC:
- 78.89 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER METRIC:
- 5.50 MM
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- HEAD DIAMETER:
- 34,00 MM
- HEAD DIAMETER METRIC:
- 34.00 MM
- UNITS:
- EACH
$31.17 -
VESRAH Exhaust Gasket VE-4002
VESRAH
$54.95A failing exhaust gasket compromises both performance and longevity—exhaust leaks steal horsepower, increase noise, and allow corrosive gases to damage surrounding components. The VESRAH VE-4002 exhaust gaskets provide reliable, long-lasting seals that...VX4002- SKU:
- VX4002
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$54.95 -
VESRAH Intake Valve GG-1043-IN
VESRAH
$34.33Valve degradation directly impacts combustion efficiency, throttle response, and overall engine longevity. The VESRAH Intake Valve GG-1043-IN delivers OEM-equivalent precision without the premium price tag, ensuring your engine maintains peak performance...09260054- SKU:
- 09260054
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 36.00 MM
- HEAD DIAMETER:
- 36,00 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER METRIC:
- 6.60 MM
- LENGTH METRIC:
- 105.70 MM
$34.33 -
VESRAH Exhaust Valve GG-1043-EX
VESRAH
$54.83Exhaust valves are critical to your engine's breathing efficiency and longevity. Over time, OEM valves can warp, burn, or lose sealing integrity, causing power loss and increased emissions. The VESRAH Exhaust Valve GG-1043-EX delivers...09260055- SKU:
- 09260055
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- HEAD DIAMETER METRIC:
- 31.00 MM
- LENGTH METRIC:
- 104.20 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER METRIC:
- 6.60 MM
- APPLICATION:
- EXHAUST
- HEAD DIAMETER:
- 31,00 MM
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
$54.83 -
POWERSTANDS RACING Case Saver/Sprocket Cover Gun - Metal 04-04152-29
POWERSTANDS RACING
$99.95A broken chain can destroy an engine case in seconds—this CNC-machined case saver intercepts that catastrophic failure before it happens. By replacing your OEM plastic sprocket cover with a precision-engineered aluminum design, you gain real protection...09500785- SKU:
- 09500785
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- GUNMETAL
- PRODUCT NAME:
- CASE SAVER
- PRODUCT NAME:
- SPROCKET COVER
- TYPE:
- ENGINE
- UNITS:
- EACH
$99.95 -
POWERSTANDS RACING Cam Chain Tensioner 03-02000-29
POWERSTANDS RACING
$74.95The OEM automatic tensioner is a common failure point that compromises engine timing and accelerates wear on your cam chain and valvetrain. POWERSTANDS Racing's billet aluminum tensioner eliminates hydraulic pressure fluctuations and provides consistent,...09250786- SKU:
- 09250786
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- TENSIONER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM CHAIN
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- TYPE:
- MANUAL
$74.95 -
POWERSTANDS RACING Cam Chain Tensioner 03-02001-29
POWERSTANDS RACING
$74.95OEM automatic cam chain tensioners are notorious for wear, inconsistent tension, and timing problems that compromise engine reliability and performance. The POWERSTANDS RACING cam chain tensioner eliminates these issues with a precision-engineered...09250787- SKU:
- 09250787
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- PRODUCT NAME:
- TENSIONER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM CHAIN
- TYPE:
- MANUAL
$74.95 -
POWERSTANDS RACING Cam Chain Tensioner 04-02002-29
POWERSTANDS RACING
$74.95OEM automatic cam chain tensioners are prone to hydraulic failure, leading to timing inconsistencies and premature engine wear. The POWERSTANDS RACING cam chain tensioner eliminates these issues with a precision CNC-machined design that maintains...09250790- SKU:
- 09250790
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- TENSIONER
- TYPE:
- MANUAL
- RIDING STYLE:
- ATV
- TYPE:
- CAM CHAIN
- UNITS:
- EACH
$74.95 -
POWERSTANDS RACING Drain Plug 00-01941-25
POWERSTANDS RACING
$25.95Drain plugs are a critical component in any high-performance engine bay—they're responsible for retaining your oil during operation while allowing quick, clean drains during maintenance. The POWERSTANDS RACING Drain Plug eliminates guesswork and...09200098- SKU:
- 09200098
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- DIAMETER - THREAD SIZE METRIC:
- M8 X 1.25 X 12 MM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- COLOR/FINISH:
- BLUE
- FEATURES:
- MAGNETIC
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL DRAIN
- UNITS:
- EACH
$25.95 -
POWERSTANDS RACING Drain Plug 00-01942-22
POWERSTANDS RACING
$25.95A drain plug might seem like a minor component, but a loose or lost plug can mean catastrophic engine damage and costly downtime. The POWERSTANDS RACING Drain Plug delivers the reliability you need with CNC-machined precision and a built-in magnet to...09200099- SKU:
- 09200099
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.25 X 20 MM
- FEATURES:
- MAGNETIC
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL DRAIN
- UNITS:
- EACH
$25.95 -
POWERSTANDS RACING Drain Plug 00-01946-25
POWERSTANDS RACING
$25.95A quality drain plug might seem like a small detail, but it's critical for engine protection and reliability during high-performance driving. The POWERSTANDS Racing Drain Plug combines precision engineering with practical features that eliminate common...09200109- SKU:
- 09200109
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- OIL DRAIN
- DIAMETER - THREAD SIZE METRIC:
- M12 X 1.50 X 15 MM
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95 -
POWERSTANDS RACING Drain Plug 00-01948-25
POWERSTANDS RACING
$25.95A quality drain plug isn't just about preventing leaks—it's about reliability when it matters most. The POWERSTANDS RACING Drain Plug combines precision engineering with practical safety features, ensuring your oil system stays secure through...09200114- SKU:
- 09200114
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLUE
- DIAMETER - THREAD SIZE METRIC:
- M14 X 1.25
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95 -
WSM Piston Kit - Kawasaki - Standard 010-812K
WSM
$73.24If you're rebuilding a Kawasaki engine or replacing worn pistons, you need a kit engineered to handle the demands of high-RPM operation without sacrificing longevity. WSM's piston kit delivers OEM-equivalent quality with performance-enhancing...010812X- SKU:
- 010812X
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE SIZE METRIC:
- 75.00 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- ORIGINAL
$73.24 -
WSM Piston Rings 010-934
WSM
$24.97Piston rings are critical to engine sealing and compression—worn or damaged rings lead to blow-by, lost power, and increased oil consumption. WSM Piston Rings 010-934 are precision-engineered to restore factory compression and maintain cylinder sealing...010934- SKU:
- 010934
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
$24.97 -
MOTORSPORT PRODUCTS Engine Stand 60-1002
MOTORSPORT PRODUCTS
$216.70Working on motorcycle engines demands the right support—literally. The MOTORSPORT PRODUCTS Engine Stand 60-1002 gives you the stability and flexibility to access every angle of your engine, whether you're performing routine maintenance or a complete...09500869- SKU:
- 09500869
- Availability:
- Ships Same Business Day
- Weight:
- 19.61 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- STAND
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$216.70 -
MOOSE RACING Carb Mid Body Gasket Kit 26-1513
MOOSE RACING
$27.95A leaking FCR carburetor mid-body compromises fuel delivery precision and creates a costly mess in your intake manifold. This complete gasket kit eliminates the need to source components piecemeal from multiple suppliers, giving you everything required...09351013- SKU:
- 09351013
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CARBURETOR
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$27.95 -
MOOSE RACING Washer/Snap Ring Counter Shaft 25-6001
MOOSE RACING
$39.95Front sprocket replacement is only half the job—securing the countershaft properly is what separates a reliable setup from a future headache. The MOOSE RACING Washer/Snap Ring Counter Shaft kit ensures your countershaft stays locked in place under load,...09350483- SKU:
- 09350483
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- COUNTERSHAFT
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- ATV
- UNITS:
- 10 PACK
- RIDING STYLE:
- OFF-ROAD
$39.95 -
MOOSE RACING Washer/Snap Ring Counter Shaft 25-6002
MOOSE RACING
$24.95Front sprocket replacement jobs demand precision fastening to ensure your countershaft stays secure under load and acceleration stress. Keeping MOOSE RACING washer and snap ring sets in your maintenance kit eliminates downtime sourcing individual...09350484- SKU:
- 09350484
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- WASHER
- UNITS:
- 10 PACK
$24.95 -
MOOSE RACING Washer/Snap Ring Counter Shaft 25-6005
MOOSE RACING
$35.95Front sprocket replacement requires precision hardware that won't let you down mid-ride. MOOSE RACING's washer and snap ring set ensures your countershaft stays secure and properly seated, eliminating the risk of component slippage or damage during...09350487- SKU:
- 09350487
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- 10 PACK
- PRODUCT NAME:
- WASHER
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
$35.95 -
MOOSE RACING Washer/Snap Ring Counter Shaft 25-6007
MOOSE RACING
$10.95Countershaft fastening components are critical to maintaining proper sprocket alignment and preventing costly drivetrain failures. The MOOSE RACING Washer/Snap Ring Counter Shaft assembly ensures secure retention of your front sprocket during high-RPM...09350489- SKU:
- 09350489
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- COUNTERSHAFT
- PRODUCT NAME:
- SNAP RING
- UNITS:
- 10 PACK
$10.95
