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
-
Cylinder Works Cylinder Head Kit 2004-2006 Suzuki RM-Z250 CH3002-K01
CYLINDER WORKS
$685.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Head Kit Standard Bore CH3002-K01. This high-quality replacement cylinder head is expertly designed to enhance airflow and optimize combustion, ensuring your engine runs efficiently and...09311019- SKU:
- 09311019
- Availability:
- Ships Same Business Day
- Weight:
- 5.46 LBS
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- UNITS:
- KIT
$685.95Qty in Cart: 0Quantity:Price:$685.95Subtotal: -
Cylinder Works Standard Bore Cylinder Yamaha YZ450F 2020 CW20014
CYLINDER WORKS
$421.95Upgrade your engine's performance with the CYLINDER WORKS Standard CW20014. This ready-to-install, direct bolt-on cylinder is designed to fit seamlessly with your existing setup, offering durability and reliability without the need for re-plating...09311020- SKU:
- 09311020
- Availability:
- Ships Same Business Day
- Weight:
- 3.56 LBS
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER:
- 97,00 MM
- STYLE:
- STANDARD
$421.95 -
Cylinder Works Cylinder for KTM 250 SX-F 2013-2015 250 XC-F 2013-2015 250 XCF-W 2014 50004
CYLINDER WORKS
$526.95Enhance your engine's performance with the Cylinder Works Standard 50004. Designed for seamless installation, these direct bolt-on cylinders offer a perfect fit without the need for re-plating. Crafted with Nickel Silicon Carbide plating, they ensure...09310492- SKU:
- 09310492
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- BORE SIZE METRIC:
- 77.95 MM
- CYLINDER DIAMETER:
- 78,00 MM
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- UNITS:
- EACH
$526.95Qty in Cart: 0Quantity:Price:$526.95Subtotal: -
Cylinder Works Standard Bore Cylinder for Yamaha YZ450F 2010-2017 20005
CYLINDER WORKS
$547.95Upgrade your YZ450F with our premium Cylinder Works Cylinder, designed for seamless installation and exceptional performance. Crafted with precision, this cylinder offers the reliability and durability you expect, enhancing your riding experience without...09310396- SKU:
- 09310396
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- BORE SIZE METRIC:
- 97.00 MM
- CYLINDER DIAMETER:
- 97,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- UNITS:
- EACH
$547.95 -
Cylinder Works Standard Bore Cylinder Kawasaki KX250F 2009 30004
CYLINDER WORKS
$421.95Enhance your KX250F's performance with our premium Cylinder Works Standard Cylinder. Designed for easy installation, this cylinder provides a perfect fit and mimics the original equipment manufacturer (OEM) specifications, ensuring a seamless upgrade...09310398- SKU:
- 09310398
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 77.00 MM
- CYLINDER DIAMETER:
- 77,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
$421.95Qty in Cart: 0Quantity:Price:$421.95Subtotal: -
Cylinder Works Standard Bore Cylinder Kawasaki KX250F 2010 30005
CYLINDER WORKS
$434.95Experience unmatched performance with the Cylinder Works Standard Cylinder for the KX250F 2010. Designed for easy installation, this direct bolt-on replacement offers the durability and efficiency you expect from top-tier components. With its advanced...09310399- SKU:
- 09310399
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- BORE SIZE METRIC:
- 77.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
$434.95 -
Cylinder Works Standard Bore Cylinder Kawasaki KX250F 2011-2012 30006
CYLINDER WORKS
$421.95Upgrade your KX250F with our high-quality Cylinder Works Cylinder, designed for seamless installation and exceptional performance. Engineered to match OEM specifications, this cylinder offers durability and reliability without the need for re-plating...09310400- SKU:
- 09310400
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- STYLE:
- STANDARD
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$421.95 -
Cylinder Works Standard Bore Cylinder for KTM 350 SX-F 2011-2012 50001
CYLINDER WORKS
$526.95Upgrade your ride with the CYLINDER WORKS Standard Cylinder for the KTM350 SX-F. Designed for effortless installation, this high-performance cylinder combines durability and precision to enhance your bike's power and efficiency. With its OEM-like...09310403- SKU:
- 09310403
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE SIZE METRIC:
- 88.00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
$526.95 -
Cylinder Works Standard Bore Cylinder KTM 250 SX-F 2005-2012 50002
CYLINDER WORKS
$526.95Upgrade your ride with the CYLINDER WORKS Cylinder for KTM250 and 50002, designed for seamless installation and optimal performance. Crafted in the U.S.A., this cylinder combines durability with precision engineering, ensuring your bike runs like new...09310404- SKU:
- 09310404
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- CYLINDER DIAMETER:
- 76,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- BORE SIZE METRIC:
- 76.00 MM
- CYLINDER DIAMETER METRIC:
- 76.00 MM
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$526.95Qty in Cart: 0Quantity:Price:$526.95Subtotal: -
Cylinder Works 76mm Standard Bore Cylinder Kit for 2005-2012 KTM 250 SX-F 50002-K01
CYLINDER WORKS
$895.95Experience unmatched performance and reliability with the CYLINDER WORKS Cylinder Kit. Designed as a direct bolt-on replacement, these kits offer a hassle-free installation while maintaining the high standards of OEM quality. Each kit is engineered for...09310408- SKU:
- 09310408
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- CYLINDER DIAMETER METRIC:
- 76.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER:
- 76,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
$895.95 -
Cylinder Works Honda CRF450X 2005-2017 Standard Bore Cylinder Kit 10008-K01
CYLINDER WORKS
$664.95Upgrade your engine with the Cylinder Works Cylinder Kit, designed for seamless installation and optimal performance. This high-quality kit features components that mirror OEM specifications, ensuring a perfect fit and exceptional durability. With...09310274- SKU:
- 09310274
- Availability:
- Ships Same Business Day
- Weight:
- 4.65 LBS
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.1:1
- ENGINE TYPE:
- 4-CYCLE
$664.95 -
Cylinder Works Standard Bore Cylinder Kit for 2005-2007 Yamaha YZ250F 20002-K02
CYLINDER WORKS
$723.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for seamless installation and optimal performance. This kit features high-quality components that mirror OEM specifications, ensuring a reliable fit and enhanced durability. Experience...09310279- SKU:
- 09310279
- Availability:
- Ships Same Business Day
- Weight:
- 3.95 LBS
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
$723.95 -
Cylinder Works Yamaha YZ450F 2003-2005 WR450F 2003-2006 Cylinder Kit 20001-K02
CYLINDER WORKS
$750.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for seamless installation and optimal performance. This kit provides all the essential components, ensuring a perfect fit and enhanced durability, making it an excellent choice for both...09310280- SKU:
- 09310280
- Availability:
- Ships Same Business Day
- Weight:
- 4.33 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER:
- 95,00 MM
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
$750.95 -
Cylinder Works Honda CRF450R 2002-2008 High Compression Cylinder Kit 10002-K01HC
CYLINDER WORKS
$747.25Elevate your engine's performance with the CYLINDER WORKS High Compression Cylinder Kit. Designed for seamless installation, this kit combines OEM-like aesthetics with advanced engineering for enhanced durability and efficiency. Experience a boost in...09310291- SKU:
- 09310291
- Availability:
- Ships Same Business Day
- Weight:
- 4.80 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- UNITS:
- KIT
- STYLE:
- HIGH COMPRESSION
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- RIDING STYLE:
- OFF-ROAD
$747.25Qty in Cart: 0Quantity:Price:$747.25Subtotal: -
Cylinder Works Standard Bore Cylinder Honda CRF150R 2007-2018 10004
CYLINDER WORKS
$354.95Experience unmatched performance and reliability with the CYLINDER WORKS Cylinder Standard 10004. Designed for seamless installation, these cylinders are engineered to meet or exceed OEM specifications, offering a perfect fit and exceptional durability...09310163- SKU:
- 09310163
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.00 MM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 66,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 66.00 MM
- STYLE:
- STANDARD
$354.95 -
Cylinder Works Big Bore Cylinder Kit 269cc 2004-2008 Kawasaki KX250F 31001-K01
CYLINDER WORKS
$790.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for seamless installation, this kit offers a perfect blend of durability and efficiency, ensuring your ride delivers power and smooth operation. Each component is...09310120- SKU:
- 09310120
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- OVERBORE METRIC:
- +3.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 80,00 MM
- DISPLACEMENT:
- 269 CC
- STYLE:
- BIG BORE
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
$790.95 -
Cylinder Works Standard Bore Cylinder for Honda CRF250R 2004-2009 10001
CYLINDER WORKS
$367.95Experience unmatched performance with the CYLINDER WORKS Standard 10001. This ready-to-install, direct bolt-on cylinder is designed for seamless integration, ensuring your engine runs smoothly without the need for re-plating. Crafted with precision in...09310128- SKU:
- 09310128
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- CYLINDER DIAMETER:
- 78,00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- COMPRESSION RATIO IMPERIAL:
- 12.9:1
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- UNITS:
- EACH
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$367.95 -
Cylinder Works Big Bore Gasket Kit 2010-2022 Suzuki RM-Z250 80.00mm Bore 41004-G01
CYLINDER WORKS
$68.95Upgrade your engine's performance with the CYLINDER WORKS Big Bore Gasket Kit 41004-G01. This ready-to-install kit features high-quality components that ensure a perfect fit and enhanced durability, allowing you to experience improved power and...09342151- SKU:
- 09342151
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NICKEL SILICON CARBIDE
- STYLE:
- BIG BORE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- OVERSIZED (+3.00 MM)
- PRODUCT NAME:
- GASKET KIT
$68.95 -
Cylinder Works Big Bore Gasket Kit 81mm Bore 2013-2015 KTM 250 SX-F 51004-G01
CYLINDER WORKS
$128.95Enhance your engine's performance with the CYLINDER WORKS Big Bore Gasket Kit 51004-G01. This ready-to-install kit offers a seamless upgrade, featuring components that mirror OEM specifications while delivering superior durability and efficiency...09343130- SKU:
- 09343130
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NICKEL SILICON CARBIDE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- STYLE:
- BIG BORE
- UNITS:
- KIT
$128.95 -
Cylinder Works Big Bore Gasket Kit Yamaha YZ250F 2014-2018 21010-G01
CYLINDER WORKS
$99.95Upgrade your engine's performance with the CYLINDER WORKS Big Bore Gasket Kit 21010-G01. This complete kit offers a seamless, direct bolt-on solution that enhances power without the need for extensive modifications. Crafted for durability and efficiency,...09344052- SKU:
- 09344052
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- BIG BORE
- MATERIAL:
- NICKEL SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
$99.95
