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!
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- Qty in Cart
- Quantity
- Price
- Subtotal
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Cylinder Works Cylinder Head Kit Honda CRF250R 2004-2007 CH1003-K01
CYLINDER WORKS
$592.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Head Kit CH1003-K01. This high-quality replacement cylinder head is designed for enthusiasts seeking enhanced power and efficiency. Crafted in the U.S.A., it combines advanced engineering...09300129- SKU:
- 09300129
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- CYLINDER HEAD KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
$592.95 -
Cylinder Works High Compression Cylinder Kit 2003-2005 Honda CRF250R 10007-K02HC
CYLINDER WORKS
$636.95Upgrade your engine's performance with our High Compression Cylinder Kit, designed for effortless installation and optimal efficiency. This ready-to-install, direct bolt-on solution mimics the original equipment manufacturer (OEM) cylinders while...09310584- SKU:
- 09310584
- Availability:
- Ships Same Business Day
- Weight:
- 3.45 LBS
- COMPRESSION RATIO IMPERIAL:
- 14.1:1
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- HIGH COMPRESSION
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 76,80 MM
- CYLINDER DIAMETER METRIC:
- 76.80 MM
$636.95 -
Cylinder Works Standard Bore Cylinder Kit for Kawasaki KX450F 2009-2012 30011-K01
CYLINDER WORKS
$677.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for easy installation and optimal performance. This complete kit includes everything you need for a seamless replacement, ensuring your engine runs smoothly and efficiently. With...09310596- SKU:
- 09310596
- Availability:
- Ships Same Business Day
- Weight:
- 4.25 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- STYLE:
- STANDARD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
$677.95 -
Cylinder Works Kawasaki KX450F 2015 Standard Bore Cylinder Kit 30011-K03
CYLINDER WORKS
$690.95Upgrade your engine with the Cylinder Works Cylinder Kit, designed for seamless installation and superior performance. This ready-to-install kit features OEM-like aesthetics and comes equipped with high-quality Vertex pistons for enhanced durability and...09310600- SKU:
- 09310600
- Availability:
- Ships Same Business Day
- Weight:
- 4.20 LBS
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
$690.95 -
Cylinder Works Standard Bore Cylinder Kit 77mm Bore Kawasaki KX250F 2011-2014 30006-K01
CYLINDER WORKS
$666.95Upgrade your engine with the CYLINDER WORKS Cylinder Standard 30006-K01, designed for seamless installation and optimal performance. These high-quality, ready-to-install cylinders mirror OEM specifications while enhancing durability and reducing engine...09310423- SKU:
- 09310423
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
$666.95 -
Cylinder Works Standard Bore Cylinder Kit CRF 150 R 2012-2024 10004-K02
CYLINDER WORKS
$539.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit Standard 10004-K02, designed for seamless installation and optimal performance. This high-quality kit offers a perfect fit, ensuring your engine runs smoothly and efficiently without the need for...09310486- SKU:
- 09310486
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 66,00 MM
- DISPLACEMENT:
- 149 CC
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 66.00 MM
- RIDING STYLE:
- OFF-ROAD
$539.95 -
Cylinder Works Standard Bore Cylinder Honda CRF450R 2009-2016 10006
CYLINDER WORKS
$434.95Enhance your CRF450R's performance with the CYLINDER WORKS Standard Cylinder. Designed for seamless installation, this direct bolt-on solution eliminates the need for re-plating while delivering durability and reliability. Crafted in the U.S.A., this...09310391- SKU:
- 09310391
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- BORE SIZE METRIC:
- 96.00 MM
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 96,00 MM
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
$434.95 -
Cylinder Works Honda CRF250R 2010-2017 Standard Bore Cylinder 76.8mm 13.2:1 10007
CYLINDER WORKS
$407.95Upgrade your CRF250R with the Cylinder Works Standard Cylinder, designed for effortless installation and superior performance. This ready-to-install, direct bolt-on cylinder mirrors the quality of OEM parts while enhancing durability and longevity...09310392- SKU:
- 09310392
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE METRIC:
- 76.80 MM
- CYLINDER DIAMETER:
- 76,80 MM
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 76.80 MM
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$407.95 -
Cylinder Works Cylinder Standard RMZ250 2007 40003
CYLINDER WORKS
$461.95Upgrade your RMZ250 with the Cylinder Works Standard Cylinder, designed for seamless installation and optimal performance. Crafted in the U.S.A., this high-quality replacement cylinder offers durability and reliability without the need for re-plating...09310401- SKU:
- 09310401
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE SIZE METRIC:
- 77.00 MM
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
$461.95 -
Cylinder Works Standard Bore Cylinder Kit 350 SX-F 2011-2012 50001-K01
CYLINDER WORKS
$867.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Kit, designed for easy installation and optimal durability. This ready-to-install kit features components that mirror OEM specifications, ensuring a seamless fit and exceptional...09310406- SKU:
- 09310406
- Availability:
- Ships Same Business Day
- Weight:
- 3.80 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- DISPLACEMENT:
- 350 CC
- STYLE:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 88,00 MM
- CYLINDER DIAMETER METRIC:
- 88.00 MM
$867.95 -
Cylinder Works 365cc Big Bore Cylinder Kit for 2011-2012 KTM 350 SX-F 350cc 51001-K01
CYLINDER WORKS
$982.95Experience unparalleled performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for easy installation, this kit offers a seamless fit without the need for re-plating, ensuring your engine runs smoothly and efficiently. Crafted in the U.S.A.,...09310410- SKU:
- 09310410
- Availability:
- Ships Same Business Day
- Weight:
- 3.64 LBS
- DISPLACEMENT:
- 365 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER DIAMETER:
- 90,00 MM
- ENGINE TYPE:
- 4-CYCLE
- OVERBORE METRIC:
- +2.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 90.00 MM
$982.95 -
Cylinder Works Big Bore Cylinder Kit 276cc 2006-2012 KTM 250 SX-F 250 XC-F 250 XCF-W 51002-K01
CYLINDER WORKS
$982.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for easy installation, this kit offers a seamless fit with OEM components while enhancing power and efficiency. With high-quality materials and precision...09310411- SKU:
- 09310411
- Availability:
- Ships Same Business Day
- Weight:
- 3.26 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 276 CC
- OVERBORE METRIC:
- +3.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.3:1
- CYLINDER DIAMETER:
- 80,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 80.00 MM
$982.95 -
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 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 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 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
