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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Cylinder Works Standard Bore Cylinder Kit for Kawasaki KX250F 2004-2005 and Suzuki RM-Z250 2004-2006 30001-K01
CYLINDER WORKS
$686.95Elevate your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 30001-K01. This ready-to-install, direct bolt-on kit is designed to seamlessly replace your OEM cylinders, delivering exceptional durability and efficiency. Engineered for...09310275- SKU:
- 09310275
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$686.95Qty in Cart: 0Quantity:Price:$686.95Subtotal: -
Cylinder Works Standard Bore Cylinder Kit for Kawasaki KX250F 2006-2008 30001-K02
CYLINDER WORKS
$686.95Enhance your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 30001-K02. This ready-to-install solution offers a seamless fit with OEM specifications, ensuring optimal functionality without the need for re-plating. Crafted for...09310276- SKU:
- 09310276
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
$686.95 -
Cylinder Works Standard Bore Cylinder Kit Yamaha YZ250F 2001-2004 20002-K01
CYLINDER WORKS
$750.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for effortless installation and optimal performance. This high-quality kit features components that mirror OEM specifications, ensuring a seamless fit and enhanced durability. With...09310278- SKU:
- 09310278
- Availability:
- Ships Same Business Day
- Weight:
- 3.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.7:1
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$750.95Qty in Cart: 0Quantity:Price:$750.95Subtotal: -
Cylinder Works Yamaha YZ250F 2008-2013 Standard Bore Cylinder Kit 20002-K03
CYLINDER WORKS
$750.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for seamless installation and optimal performance. This complete kit features high-quality components that ensure durability and efficiency, making it the perfect choice for enthusiasts...09310281- SKU:
- 09310281
- Availability:
- Ships Same Business Day
- Weight:
- 3.62 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$750.95 -
Cylinder Works Standard Bore Cylinder Kit for Yamaha YZ450F 2006-2009 20003-K01
CYLINDER WORKS
$750.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for effortless installation and optimal performance. These direct bolt-on cylinders mirror OEM specifications, ensuring a seamless fit and enhanced durability. With Vertex pistons...09310282- SKU:
- 09310282
- Availability:
- Ships Same Business Day
- Weight:
- 3.33 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 95,00 MM
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-CYCLE
$750.95 -
Cylinder Works High Compression Cylinder Kit for Honda CRF150R 2007-2014 10004-K01HC
CYLINDER WORKS
$579.95Elevate your engine's performance with the High Compression Cylinder Kit. Designed for easy installation, this kit offers a seamless fit without the need for re-plating, ensuring a professional finish that mirrors OEM quality. Featuring premium Vertex...09310288- SKU:
- 09310288
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- CYLINDER DIAMETER:
- 66,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 12.2:1
- CYLINDER DIAMETER METRIC:
- 66.00 MM
- DISPLACEMENT:
- 149 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$579.95Qty in Cart: 0Quantity:Price:$579.95Subtotal: -
Cylinder Works High Compression Cylinder Kit for Honda CRF250X 2016-2017 10001-K01HC
CYLINDER WORKS
$635.95Upgrade your engine with the CYLINDER WORKS High Compression Cylinder Kit, designed for effortless installation and optimal performance. This direct bolt-on solution mirrors the quality of OEM cylinders while enhancing longevity and reducing engine noise...09310289- SKU:
- 09310289
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- CYLINDER DIAMETER:
- 78,00 MM
- STYLE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
$635.95 -
MOOSE RACING Engine Oil Seal Kit - Honda 822357
MOOSE RACING
$59.71Engine oil seals deteriorate over time, leading to slow leaks that compromise oil pressure, increase consumption, and accelerate internal wear. This complete seal kit eliminates guesswork by providing every critical seal your engine needs in one package,...09351027- SKU:
- 09351027
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- ENGINE
- TYPE:
- OIL
$59.71Qty in Cart: 0Quantity:Price:$59.71Subtotal: -
MOOSE RACING Oil Seal Set - Honda 822378
MOOSE RACING
$37.56Engine seal degradation is one of the most common sources of oil leakage and contamination in high-mileage Honda engines. This complete oil seal set eliminates the guesswork of sourcing individual seals by bundling every critical seal your engine...09351052- SKU:
- 09351052
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- OIL
- UNITS:
- KIT
- APPLICATION:
- ENGINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
$37.56Qty in Cart: 0Quantity:Price:$37.56Subtotal: -
MOOSE RACING Oil Seal Set - Kawasaki 822379
MOOSE RACING
$28.85Engine seal degradation is one of the most common culprits behind oil leaks, reduced compression, and premature wear in high-performance applications. This comprehensive MOOSE RACING Oil Seal Set eliminates guesswork by providing every critical seal your...09351053- SKU:
- 09351053
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
$28.85 -
MOOSE RACING Oil Seal Set - Yamaha 822994
MOOSE RACING
$28.85Includes every seal in a engine including crank shaft seals, Does not include valve stem seal, Made in the USA09351055- SKU:
- 09351055
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$28.85 -
Pro Circuit Oil Filter Cover for Kawasaki KX450F 2016-2025 PC4009-0015
PRO CIRCUIT
$39.95Upgrade your KX450F with the PRO CIRCUIT Oil Filter Cover, crafted from premium aircraft-grade aluminum for unparalleled durability and performance. Its stunning mirror finish, combined with an anodized surface, not only enhances the aesthetic appeal but...09401492- SKU:
- 09401492
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILTER
- COLOR/FINISH:
- MIRROR
$39.95 -
ProFilter Oil Filter for Honda CB1000R 2011-2016 PF-204B
PRO FILTER
$12.99Experience superior engine protection with the PRO FILTER Replacement Oil Filter PF-204B. Designed for high performance, this filter ensures optimal flow rates and durability, making it the perfect choice for both synthetic and petroleum-based oils...07120609- SKU:
- 07120609
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BASE COLOR:
- BLACK
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- PREMIUM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- COLOR/FINISH:
- BLACK
$12.99 -
Pro Filter Oil Filter for Honda CB500X 2014-2019 PF-204C
PRO FILTER
$16.99Enhance your engine's performance with the PRO FILTER Replacement Oil Filter PF-204C, designed for high efficiency and reliability. This premium filter features advanced micro-pore filtration technology, ensuring optimal oil flow and exceptional...07120610- SKU:
- 07120610
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- STYLE:
- PREMIUM
$16.99 -
Pro Filter Oil Filter for Honda CB1000 1994-1995 PF-303C
PRO FILTER
$17.99Experience superior engine protection with the PRO FILTER Replacement Oil Filter PF-303C. Designed to meet and exceed OEM specifications, this high-performance filter ensures optimal filtration and flow rates, making it suitable for both synthetic and...07120612- SKU:
- 07120612
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- STYLE:
- PREMIUM
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
$17.99 -
Pro Filter Replacement Oil Filter for 1983 Honda CB1000C Custom PF-401
PRO FILTER
$8.99Upgrade your engine's performance with the PRO FILTER Replacement Oil Filter PF-401. Designed to meet and exceed OEM specifications, this high-performance filter ensures optimal filtration and flow rates, making it ideal for both synthetic and...07120613- SKU:
- 07120613
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- FEATURES:
- COMPLETE CHANGE KIT
- PRODUCT NAME:
- OIL FILTER
- STYLE:
- PREMIUM
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$8.99 -
On Sale
Wiseco Ring Set 75.50mm Honda XR250R 1986-2004 2973XC
WISECO
MSRP: $49.95Now: $42.00Was: $49.95The Wiseco Ring Set 2973XC is engineered to restore proper ring seal and compression in your Honda XR250R, which directly impacts throttle response, fuel efficiency, and engine longevity. Worn or incorrect ring sets allow blow-by and compression...2973XC- SKU:
- 2973XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 75.50 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco 75.50mm Ring Set for Kawasaki ZX1000 Ninja 1000R 1986-1987 2973XG
WISECO
MSRP: $50.51Now: $42.00Was: $50.51Maintaining proper ring seal is critical for maximizing compression, controlling blow-by, and preserving ring groove integrity in your ZX1000 engine. The Wiseco 2973XG Ring Set delivers precision-engineered construction that matches OEM specifications...2973XG- SKU:
- 2973XG
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- BORE SIZE METRIC:
- 75.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
MSRP: $50.51Now: $42.00Was: $50.51Qty in Cart: 0Quantity:Price:MSRP: $50.51Now: $42.00Was: $50.51Subtotal: -
On Sale
Wiseco Ring Set 75.00mm 2010-2011 BMW S1000RR 2953XG
WISECO
MSRP: $52.95Now: $42.00Was: $52.95Piston ring integrity is critical to engine sealing, compression, and longevity—degraded or worn rings lead to blow-by, oil consumption, and power loss. The Wiseco 2953XG ring set delivers OEM-equivalent performance with the precision engineering...2953XG- SKU:
- 2953XG
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- DISPLACEMENT:
- 250 CC
- BORE SIZE METRIC:
- 75.00 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
MSRP: $52.95Now: $42.00Was: $52.95Qty in Cart: 0Quantity:Price:MSRP: $52.95Now: $42.00Was: $52.95Subtotal: -
On Sale
Wiseco Piston Kit Kawasaki KX250 2002-2004 799M06750
WISECO
MSRP: $221.95Now: $157.00Was: $221.95The factory piston in your KX250 is a wear item with a finite lifespan—once it starts to degrade, throttle response suffers and power output drops noticeably. Wiseco's precision-engineered piston kit restores your engine to peak performance with...09101242- SKU:
- 09101242
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- +1,10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +1.10 MM
- DISPLACEMENT:
- 249,3 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $221.95Now: $157.00Was: $221.95
