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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On Sale
VESRAH Intake Valve GG-1050-IN
VESRAH
MSRP: $31.17Now: $29.61Was: $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...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
MSRP: $31.17Now: $29.61Was: $31.17 -
On Sale
VESRAH Exhaust Gasket VE-4002
VESRAH
MSRP: $54.95Now: $52.20Was: $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...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
MSRP: $54.95Now: $52.20Was: $54.95 -
On Sale
VESRAH Complete Gasket Kit - TS250 VG-326
VESRAH
MSRP: $30.81Now: $29.27Was: $30.81A complete gasket kit eliminates guesswork during engine rebuilds by providing every seal you need in one package, reducing the risk of assembly errors and costly comebacks. Whether you're performing...VG326- SKU:
- VG326
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- COMPLETE
- UNITS:
- SET
MSRP: $30.81Now: $29.27Was: $30.81Qty in Cart: 0Quantity:Price:MSRP: $30.81Now: $29.27Was: $30.81Subtotal: -
On Sale
VESRAH Intake Valve GG-1043-IN
VESRAH
MSRP: $34.33Now: $32.61Was: $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...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
MSRP: $34.33Now: $32.61Was: $34.33 -
On Sale
VESRAH Exhaust Valve GG-1043-EX
VESRAH
MSRP: $54.83Now: $52.09Was: $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...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
MSRP: $54.83Now: $52.09Was: $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...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 Case Saver/Sprocket Cover - Blue 07-04152-25
POWERSTANDS RACING
$99.95A broken chain can destroy your engine case in seconds—this POWERSTANDS Racing case saver provides the proven protection you need to keep catastrophic damage from sidelining your bike. Built with...09500792- SKU:
- 09500792
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET COVER
- COLOR/FINISH:
- ANODIZED
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal: -
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...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...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...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 Cam Chain Tensioner 05-02000-29
POWERSTANDS RACING
$74.95Factory cam chain tensioners are prone to hydraulic degradation, leading to timing slip and premature wear on your engine's most critical components. The POWERSTANDS RACING Cam Chain Tensioner...09250793- SKU:
- 09250793
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- TENSIONER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM CHAIN
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- TYPE:
- MANUAL
$74.95 -
POWERSTANDS RACING Drain Plug 00-01950-29
POWERSTANDS RACING
$25.95A quality drain plug might seem like a small detail, but it's one of the most frequently accessed points on your engine—and one of the easiest to lose or cross-thread. POWERSTANDS Racing's...09200183- SKU:
- 09200183
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- DIAMETER - THREAD SIZE METRIC:
- M16 X 1.50 X 15 MM
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- GUNMETAL
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
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...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...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
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01942-25
POWERSTANDS RACING
$25.95A quality drain plug isn't just a fastener—it's insurance against oil starvation and catastrophic engine failure. The POWERSTANDS RACING Drain Plug combines precision engineering with practical...09200101- SKU:
- 09200101
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- EACH
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.25 X 20 MM
- COLOR/FINISH:
- BLUE
- FEATURES:
- MAGNETIC
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL DRAIN
- MATERIAL:
- ALUMINUM
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
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...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
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
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,...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
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
WSM Top-End Rebuild Kit - Original Series - 1 mm 010-812-14
WSM
$205.60A top-end rebuild is essential when your engine shows signs of wear—loss of compression, increased blowby, or diminished throttle response. The WSM Original Series Top-End Rebuild Kit delivers...01081214- SKU:
- 01081214
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- PRODUCT NAME:
- REBUILD KIT
- UNITS:
- EACH
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 76.00 MM
- MODEL:
- ORIGINAL SERIES
- RIDING STYLE:
- WATERCRAFT
$205.60Qty in Cart: 0Quantity:Price:$205.60Subtotal: -
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...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 Kit - Sea-Doo - Standard 010-815K
WSM
$73.24A quality piston kit is the foundation of reliable, high-output engine performance—especially in demanding two-stroke applications where heat and friction directly impact power delivery and component...010815- SKU:
- 010815
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 76.00 MM
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
$73.24Qty in Cart: 0Quantity:Price:$73.24Subtotal:
