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 Cylinder Head Kit 2004-2006 Suzuki RM-Z250 CH3002-K01
CYLINDER WORKS
$720.25Upgrade 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...09311019- SKU:
- 09311019
- Availability:
- Ships Same Business Day
- Weight:
- 5.46 LBS
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- UNITS:
- KIT
$720.25 -
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...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...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...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...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...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
$434.95Qty in Cart: 0Quantity:Price:$434.95Subtotal: -
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...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...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...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...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
$895.95Qty in Cart: 0Quantity:Price:$895.95Subtotal: -
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,...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,...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...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...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...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...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...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,...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 -
On Sale
Cylinder Works Big Bore Gasket Kit 81mm Bore 2013-2015 KTM 250 SX-F 51004-G01
CYLINDER WORKS
MSRP: $128.95Now: $83.00Was: $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...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
MSRP: $128.95Now: $83.00Was: $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...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
