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 Standard Bore Cylinder Kit Yamaha YZ450F 2018-2019 CW20012K01
CYLINDER WORKS
$730.95Upgrade your Yamaha with the Cylinder Works Cylinder Kit, designed for seamless installation and optimal performance. This ready-to-install kit features high-quality components that ensure durability and efficiency, making it a perfect choice for...09310849- SKU:
- 09310849
- Availability:
- Ships Same Business Day
- Weight:
- 4.55 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- CYLINDER DIAMETER:
- 97,00 MM
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- STYLE:
- STANDARD
- UNITS:
- KIT
$730.95 -
Cylinder Works 2019-2020 Yamaha WR 450 F High Compression Big Bore Cylinder Kit CW20012K01HC
CYLINDER WORKS
$742.95Elevate your engine's performance with the CYLINDER WORKS Big Bore High Compression Cylinder Kit. Designed for seamless installation, this kit enhances power and efficiency while maintaining the aesthetic of your OEM setup. Crafted for durability and...09310850- SKU:
- 09310850
- Availability:
- Ships Same Business Day
- Weight:
- 4.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.8:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 97,00 MM
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- ENGINE TYPE:
- 4-CYCLE
$742.95 -
Cylinder Works Big Bore Cylinder Kit for Yamaha YZ450F 2018-2019 CW21012K01
CYLINDER WORKS
$738.95Upgrade your engine with the CYLINDER WORKS Big Bore Cylinder Kit, designed for effortless installation and superior performance. This kit features high-quality components that not only enhance power output but also maintain a quiet operation, ensuring a...09310851- SKU:
- 09310851
- Availability:
- Ships Same Business Day
- Weight:
- 4.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 99.00 MM
- DISPLACEMENT:
- 470 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 99,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$738.95 -
Cylinder Works Standard Bore Cylinder Kit for Polaris RZR 900 2017-2020 CW60007K02
CYLINDER WORKS
$1,037.95Upgrade your Polaris with the Cylinder Works Cylinder Kit, designed for seamless installation and optimal performance. This ready-to-install kit features high-quality components that mirror OEM specifications, ensuring reliability and efficiency...09310852- SKU:
- 09310852
- Availability:
- Ships Same Business Day
- Weight:
- 10.10 LBS
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER:
- 93,00 MM
- DISPLACEMENT:
- 875 CC
- RIDING STYLE:
- UTV
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- STYLE:
- STANDARD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
$1,037.95 -
Cylinder Works High Compression Big Bore Cylinder Kit for Polaris RZR 900 2017-2020 CW60007K01HC
CYLINDER WORKS
$1,110.95Upgrade your engine with the CYLINDER WORKS High Compression Big Bore Cylinder Kit, designed for optimal performance and reliability. This ready-to-install kit offers a seamless fit with OEM specifications, ensuring a hassle-free installation without the...09310853- SKU:
- 09310853
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- DISPLACEMENT:
- 875 CC
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 93,00 MM
- RIDING STYLE:
- UTV
- COMPRESSION RATIO IMPERIAL:
- 11.5:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
$1,110.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Polaris ACE 900 XC 2017-2019 CW61007K01
CYLINDER WORKS
MSRP: $1,231.95Now: $804.00Was: $1,231.95Upgrade your engine with the Cylinder Works Big Bore Cylinder Kit CW61007K01, designed for effortless installation and optimal performance. This high-quality kit offers a perfect fit and enhanced durability, ensuring your engine runs smoother and quieter...09310854- SKU:
- 09310854
- Availability:
- Ships Same Business Day
- Weight:
- 9.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 98,00 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 975 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- RIDING STYLE:
- UTV
MSRP: $1,231.95Now: $804.00Was: $1,231.95 -
Cylinder Works Standard Bore Cylinder Kit 2016-2017 Honda CRF250R 10007-K03
CYLINDER WORKS
$564.95Elevate your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 10007-K03. Designed for seamless installation, this kit offers a perfect fit, ensuring optimal functionality without the need for re-plating. Crafted in the U.S.A., it...09310674- SKU:
- 09310674
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- BORE SIZE METRIC:
- 76.80 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 76,80 MM
- CYLINDER DIAMETER METRIC:
- 76.80 MM
- STYLE:
- STANDARD
$564.95 -
Cylinder Works Standard Bore Cylinder Kit 2016-2018 Suzuki RM-Z250 40004-K03
CYLINDER WORKS
$652.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 40004-K03. Designed for easy installation, these direct bolt-on cylinders provide a seamless fit, mimicking the appearance of OEM parts. Equipped with Vertex pistons, this...09310675- SKU:
- 09310675
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.75:1
- CYLINDER DIAMETER:
- 77,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$652.95 -
Cylinder Works Standard Bore Cylinder Kit for Yamaha WR250F 2018-2019 20010-K02
CYLINDER WORKS
$694.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 20010-K02. This high-quality, ready-to-install kit ensures a seamless fit and superior durability, mirroring the OEM design while enhancing your ride's efficiency. Featuring...09310676- SKU:
- 09310676
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-CYCLE
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
$694.95 -
Cylinder Works Standard Bore Cylinder Kit Honda CRF450R 2017-2019 10010-K01
CYLINDER WORKS
$652.95Experience unmatched performance and reliability with the CYLINDER WORKS Cylinder Kit. Designed as a direct bolt-on solution, this kit ensures a seamless installation without the need for re-plating. Crafted with precision, it features Vertex pistons...09310713- SKU:
- 09310713
- Availability:
- Ships Same Business Day
- Weight:
- 4.10 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER DIAMETER:
- 96,00 MM
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-CYCLE
$652.95 -
Cylinder Works High Compression Cylinder Kit for Honda CRF450R 2017-2018 10010-K01HC
CYLINDER WORKS
$716.95Elevate your engine's performance with our High Compression Cylinder Kit, designed for seamless installation and optimal efficiency. Crafted to mirror OEM specifications, this kit ensures a perfect fit while enhancing power and durability. Experience the...09310714- SKU:
- 09310714
- Availability:
- Ships Same Business Day
- Weight:
- 4.15 LBS
- STYLE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$716.95 -
Cylinder Works Standard Bore Cylinder for 2016-2023 KTM 250 SX-F 50006
CYLINDER WORKS
$498.95Upgrade your engine with the CYLINDER WORKS Standard 50006, a premium direct bolt-on cylinder that ensures a seamless installation. Engineered for durability and performance, this cylinder features a nickel silicon carbide plating that enhances longevity...09310716- SKU:
- 09310716
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- CYLINDER DIAMETER:
- 78,00 MM
- ENGINE TYPE:
- 4-CYCLE
$498.95Qty in Cart: 0Quantity:Price:$498.95Subtotal: -
Cylinder Works Standard Bore Cylinder Kit 2016-2023 Husqvarna FC 250 50006-K01
CYLINDER WORKS
$829.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for seamless installation and exceptional performance. This kit features OEM-quality components that enhance durability and reduce engine noise, ensuring a smooth ride. Crafted with...09310717- SKU:
- 09310717
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- CYLINDER DIAMETER:
- 78,00 MM
- ENGINE TYPE:
- 4-CYCLE
- BORE SIZE METRIC:
- 78.00 MM
- STYLE:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$829.95 -
Cylinder Works Cylinder Kit 2021-2022 Gas Gas MC 250F 2021-2022 Gas Gas EX 250F 2016-2022 Husqvarna FC 250 2016-2022 KTM 250 SX-F 2016-2022 KTM 250 XC-F 2015-2016 KTM 250 SX-F FE 50006-K01HC
CYLINDER WORKS
$852.95Upgrade your engine's performance with the Cylinder Works Cylinder Kit 50006-K01HC. Designed for easy installation, this direct bolt-on solution mirrors the quality and appearance of OEM cylinders while enhancing durability and efficiency. Each kit comes...09310718- SKU:
- 09310718
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- COMPRESSION RATIO IMPERIAL:
- 14.7:1
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
- BORE SIZE METRIC:
- 78.00 MM
- CYLINDER DIAMETER:
- 78,00 MM
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
$852.95 -
Cylinder Works Big Bore Cylinder Kit 270cc 2016-2022 KTM 250 SX-F 51006-K01
CYLINDER WORKS
$960.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit 51006-K01. This ready-to-install kit offers a seamless fit, replicating the look and feel of OEM cylinders while enhancing power and efficiency. Crafted with precision, each...09310719- SKU:
- 09310719
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- ENGINE TYPE:
- 4-CYCLE
- DISPLACEMENT:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 81,00 MM
- OVERBORE METRIC:
- +3.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$960.95 -
Cylinder Works Standard Bore Cylinder Kit 88mm Bore 14:1 Compression Husqvarna FC 350 2016-2018 50007
CYLINDER WORKS
$487.95Experience unmatched performance and reliability with the Cylinder Works Cylinder Standard 50007. Engineered for seamless installation, these direct bolt-on cylinders mirror the original equipment manufacturer (OEM) design while enhancing durability...09310720- SKU:
- 09310720
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- CYLINDER DIAMETER METRIC:
- 88.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- BORE SIZE METRIC:
- 88.00 MM
- CYLINDER DIAMETER:
- 88,00 MM
- PRODUCT NAME:
- CYLINDER
$487.95 -
Cylinder Works Big Bore Cylinder Kit Kawasaki KX250F 2017-2018 31012-K01
CYLINDER WORKS
$750.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for easy installation, this kit provides a seamless upgrade, enhancing power while maintaining the look of OEM cylinders. Crafted in the U.S.A., it combines...09310724- SKU:
- 09310724
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 80,00 MM
- OVERBORE METRIC:
- +3.00 MM
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- DISPLACEMENT:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
$750.95 -
Cylinder Works Standard Bore Cylinder 2017-2019 Kawasaki KX250F 30012
CYLINDER WORKS
$402.95Experience unparalleled performance with the CYLINDER WORKS Standard 30012. These ready-to-install, direct bolt-on cylinders are designed for a seamless fit, eliminating the need for re-plating while maintaining a striking resemblance to OEM cylinders...09310725- SKU:
- 09310725
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- CYLINDER DIAMETER:
- 77,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 77.00 MM
- UNITS:
- EACH
$402.95 -
Cylinder Works Standard Bore Cylinder Kit Yamaha YZ250F 2014-2015 20010-K01
CYLINDER WORKS
$694.95Upgrade your engine with the CYLINDER WORKS Standard Bore Cylinder Kit, designed for effortless installation and optimal performance. This complete kit includes everything you need for a seamless replacement, ensuring your engine runs smoother and...09310588- SKU:
- 09310588
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- 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
$694.95 -
Cylinder Works Standard Bore Cylinder Kit Kawasaki KX450F 2013-2014 30011-K02
CYLINDER WORKS
$639.95Enhance your engine's performance with the CYLINDER WORKS Cylinder Kit, designed for a seamless installation without the need for re-plating. This high-quality kit mirrors OEM specifications while delivering unmatched durability and efficiency, thanks to...09310598- SKU:
- 09310598
- Availability:
- Ships Same Business Day
- Weight:
- 4.15 LBS
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$639.95
