Dirt Bike Cylinders and Parts
Dirt Bike Cylinders & Cylinder Kits for Yamaha, Kawasaki, KTM & Husqvarna at JJ Motorsports
Rebore or replace your dirt bike's cylinder with premium OEM-spec and big-bore cylinders from JJ Motorsports, precision-machined for perfect piston fit, maximum heat dissipation, and race-proven durability in motocross, enduro, and trail riding. Our selection includes standard bore replacements and performance cylinders from Cylinder Works, Moose Racing, and Wossner, complete with plating options for long life and easy installation. Compatible with top models like Yamaha YZ/WR250F, Kawasaki KX250F, KTM 85 SX, Husqvarna TC85, and Gas Gas MC85, these high-quality cylinders restore compression, increase displacement when paired with big-bore kits, and deliver reliable performance in dusty, high-heat conditions. Whether refreshing a scored cylinder or building a big-bore stroker, these components provide exact OEM tolerances or upgraded plating for superior wear resistance and championship-level power on every ride.
At JJ Motorsports, we stock the best dirt bike cylinders and kits from Cylinder Works, Moose Racing, and Wossner with fast shipping and expert support. Free shipping over $99!
Top Dirt Bike Cylinders & Kits
- Cylinder Works Standard Bore Cylinder 66.40mm Yamaha YZ250F/WR250F 20009 – OEM-spec replacement cylinder for Yamaha YZ250F and WR250F; ready for stock or big-bore piston, nickel-silicon carbide plating for ultimate wear resistance.
- Moose Racing Standard Cylinder Kawasaki KX250F MSE30012 – Direct OEM replacement cylinder for Kawasaki KX250F 2004-2016; precision-machined with plating for perfect fit and long life.
- Wossner Cylinder 47.00mm KTM/Husqvarna/Gas Gas 85 WBC8147A – High-performance cylinder for KTM 85 SX, Husqvarna TC85, and Gas Gas MC85; forged construction with advanced plating for 85cc 2-stroke power and durability.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
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On Sale
Cylinder Works Big Bore Cylinder Kit for Kawasaki KX250F 2011-2014 31006-K01
CYLINDER WORKS
MSRP: $790.95Now: $711.86Was: $790.95Upgrade your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit, designed for easy installation and superior durability. This kit offers a seamless fit and enhanced power without the need for complex modifications, making it the perfect...09310424- SKU:
- 09310424
- Availability:
- Ships Same Business Day
- Weight:
- 3.10 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 80,00 MM
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 269 CC
- OVERBORE METRIC:
- +3.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $790.95Now: $711.86Was: $790.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Yamaha YFZ450 2004-2013 23001-K01
CYLINDER WORKS
MSRP: $873.95Now: $786.56Was: $873.95Upgrade your engine with the CYLINDER WORKS Big Bore Cylinder Kit, designed for effortless installation and enhanced performance. This high-quality kit features OEM-like aesthetics and a durable construction that ensures reliability and longevity, making...09310425- SKU:
- 09310425
- Availability:
- Ships Same Business Day
- Weight:
- 4.57 LBS
- CYLINDER DIAMETER:
- 105,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- RIDING STYLE:
- ATV
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 105.00 MM
- OVERBORE METRIC:
- +3.00 MM
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.2:1
MSRP: $873.95Now: $786.56Was: $873.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Yamaha YZ450F 2003-2005 23001-K02
CYLINDER WORKS
MSRP: $873.95Now: $786.56Was: $873.95Upgrade your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for seamless installation, this kit enhances power while maintaining a factory-like appearance. Crafted in the U.S.A., it combines quality materials and expert...09310426- SKU:
- 09310426
- Availability:
- Ships Same Business Day
- Weight:
- 4.60 LBS
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 478 CC
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 98,00 MM
- OVERBORE METRIC:
- +3.00 MM
- UNITS:
- KIT
MSRP: $873.95Now: $786.56Was: $873.95 -
On Sale
CYLINDER WORKS Cylinder - Standard 10002
CYLINDER WORKS
MSRP: $402.95Now: $362.66Was: $402.95Ready-to-install, direct bolt-on cylinder requires no re-plating and looks virtually identical to the OEM cylinders, Nickel silicon carbide-plated for long life, Made in the U.S.A.09310129- SKU:
- 09310129
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- COMPRESSION RATIO IMPERIAL:
- 12.1:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 96,00 MM
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
MSRP: $402.95Now: $362.66Was: $402.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for Yamaha YZ250F 2005-2007 20002-K02
CYLINDER WORKS
MSRP: $395.95Now: $356.36Was: $395.95Experience unparalleled performance with the CYLINDER WORKS Cylinder Standard 20002, designed for seamless installation and exceptional durability. These ready-to-install, direct bolt-on cylinders mirror the quality of OEM products while enhancing your...09310131- SKU:
- 09310131
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE SIZE METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
MSRP: $395.95Now: $356.36Was: $395.95 -
On Sale
Cylinder Works Big Bore Kit Honda TRX450R 2004-2005 479cc 10.5:1 11003-K01
CYLINDER WORKS
MSRP: $809.95Now: $728.96Was: $809.95Upgrade your engine's performance with the Cylinder Works Big Bore Kit 11003-K01, designed for seamless installation and exceptional durability. This high-quality kit comes complete with everything you need for a hassle-free upgrade, ensuring your engine...09310133- SKU:
- 09310133
- Availability:
- Ships Same Business Day
- Weight:
- 4.47 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- OVERBORE METRIC:
- +3.00 MM
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ATV
- CYLINDER DIAMETER:
- 97,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 479 CC
- UNITS:
- KIT
MSRP: $809.95Now: $728.96Was: $809.95 -
On Sale
Cylinder Works Yamaha WR450F YFZ450R YZ450F 2007-2014 High Compression Cylinder Kit 20003-K01HC
CYLINDER WORKS
MSRP: $788.95Now: $710.06Was: $788.95Upgrade your engine with the CYLINDER WORKS High Compression Cylinder Kit, designed for effortless installation and optimal performance. Crafted to match OEM specifications, this kit ensures your engine runs smoothly while enhancing power and efficiency...09310299- SKU:
- 09310299
- Availability:
- Ships Same Business Day
- Weight:
- 4.38 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 95,00 MM
- STYLE:
- HIGH COMPRESSION
MSRP: $788.95Now: $710.06Was: $788.95 -
On Sale
Cylinder Works High Compression Cylinder Kit for Suzuki LT-R450 2006-2009 40002-K01HC
CYLINDER WORKS
MSRP: $743.95Now: $669.56Was: $743.95Transform your engine's performance with the CYLINDER WORKS High Compression Cylinder Kit. Designed for easy installation, this ready-to-use kit offers a perfect fit without the need for re-plating, ensuring both durability and efficiency. Enhance your...09310303- SKU:
- 09310303
- Availability:
- Ships Same Business Day
- Weight:
- 4.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- HIGH COMPRESSION
- CYLINDER DIAMETER:
- 95,50 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 95.50 MM
- PRODUCT NAME:
- CYLINDER KIT
MSRP: $743.95Now: $669.56Was: $743.95 -
On Sale
Cylinder Works Big Bore Kit Yamaha YZ250F 2001-2013 21002-K01
CYLINDER WORKS
MSRP: $836.95Now: $753.26Was: $836.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Kit 21002-K01. Designed for seamless installation, this kit offers a direct bolt-on solution that mirrors the quality of OEM cylinders. Featuring high-performance Vertex pistons, this kit...09310121- SKU:
- 09310121
- Availability:
- Ships Same Business Day
- Weight:
- 3.37 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 269 CC
- OVERBORE METRIC:
- +3.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER DIAMETER:
- 80,00 MM
MSRP: $836.95Now: $753.26Was: $836.95 -
On Sale
CYLINDER WORKS Cylinder - Standard 30001
CYLINDER WORKS
MSRP: $410.95Now: $369.86Was: $410.95Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Nickel Silicon Carbide plated for long life, Big bore cylinders do not require machine work, Made in the U.S.A.09310130- SKU:
- 09310130
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 77,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- BORE SIZE METRIC:
- 77.00 MM
- UNITS:
- EACH
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
Cylinder Works Standard Bore Cylinder for Yamaha YFZ450 2004-2009 2012-2013 20001
CYLINDER WORKS
MSRP: $410.95Now: $369.86Was: $410.95Upgrade your engine performance with the CYLINDER WORKS Cylinder Standard 20001, designed for effortless installation and optimal durability. This high-quality, direct bolt-on replacement offers a seamless fit and replicates the original equipment...09310132- SKU:
- 09310132
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- CYLINDER DIAMETER:
- 95,00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
Cylinder Works Big Bore Kit for Suzuki DR-Z400 2000-2004 41001-K01
CYLINDER WORKS
MSRP: $837.95Now: $754.16Was: $837.95Experience enhanced performance and durability with the CYLINDER WORKS Big Bore Kit 41001-K01. This ready-to-install, direct bolt-on cylinder is designed to seamlessly replace your OEM cylinder, delivering increased power without the need for complex...09310135- SKU:
- 09310135
- Availability:
- Ships Same Business Day
- Weight:
- 4.44 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- CYLINDER DIAMETER:
- 94,00 MM
- DISPLACEMENT:
- 434 CC
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- OVERBORE METRIC:
- +4.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 94.00 MM
- RIDING STYLE:
- ATV
MSRP: $837.95Now: $754.16Was: $837.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for Suzuki DR-Z400S 2000-2022 40001-K01
CYLINDER WORKS
MSRP: $440.95Now: $396.86Was: $440.95Experience unmatched performance and durability with the CYLINDER WORKS Cylinder Standard 40001. This ready-to-install, direct bolt-on cylinder offers a seamless fit, ensuring your engine runs smoothly and efficiently. Crafted with precision in the U.S.A...09310139- SKU:
- 09310139
- Availability:
- Ships Same Business Day
- Weight:
- 3.61 LBS
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- STREET
MSRP: $440.95Now: $396.86Was: $440.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Honda CRF150R 2012-2020 11004-K02
CYLINDER WORKS
MSRP: $694.95Now: $625.46Was: $694.95Enhance your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit 11004-K02. This ready-to-install kit offers a seamless fit and exceptional durability, making it the perfect upgrade for enthusiasts seeking improved power and efficiency...09310485- SKU:
- 09310485
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 68,00 MM
- DISPLACEMENT:
- 159 CC
- OVERBORE METRIC:
- +2.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 68.00 MM
- ENGINE TYPE:
- 4-CYCLE
MSRP: $694.95Now: $625.46Was: $694.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for 2009-2015 Kawasaki KX450F 31011-K01
CYLINDER WORKS
MSRP: $786.95Now: $708.26Was: $786.95Upgrade your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for easy installation, this kit provides a seamless fit while enhancing power and efficiency. Crafted with premium materials, it ensures durability and a quieter...09310603- SKU:
- 09310603
- Availability:
- Ships Same Business Day
- Weight:
- 3.95 LBS
- DISPLACEMENT:
- 469 CC
- OVERBORE METRIC:
- +2.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER:
- 98,00 MM
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-CYCLE
MSRP: $786.95Now: $708.26Was: $786.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for Polaris RZR XP 900 2011-2013 60001-K02
CYLINDER WORKS
MSRP: $1,204.95Now: $1,084.46Was: $1,204.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for seamless installation and optimal performance. This complete kit includes everything you need for a hassle-free upgrade, ensuring your engine runs smoothly and efficiently. Crafted...09310657- SKU:
- 09310657
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- CYLINDER DIAMETER:
- 93,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 875 CC
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
MSRP: $1,204.95Now: $1,084.46Was: $1,204.95 -
On Sale
Cylinder Works Honda CRF450X 2005-2017 Standard Bore Cylinder 10008
CYLINDER WORKS
MSRP: $421.95Now: $379.76Was: $421.95Upgrade your ride with the CYLINDER WORKS Cylinder Standard 10008, designed for seamless installation and optimal performance. This direct bolt-on cylinder mirrors the quality and appearance of OEM cylinders, ensuring a perfect fit without the need for...09311013- SKU:
- 09311013
- Availability:
- Ships Same Business Day
- Weight:
- 3.51 LBS
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- CYLINDER DIAMETER:
- 96,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
MSRP: $421.95Now: $379.76Was: $421.95 -
On Sale
Cylinder Works Cylinder Head Kit Kawasaki KX250F 2006-2008 CH3001-K01
CYLINDER WORKS
MSRP: $688.95Now: $620.06Was: $688.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Head Kit. Designed for enthusiasts seeking enhanced power and efficiency, this kit features precision-engineered components that ensure optimal airflow and combustion. Crafted in the U.S...09311018- SKU:
- 09311018
- Availability:
- Ships Same Business Day
- Weight:
- 5.51 LBS
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $688.95Now: $620.06Was: $688.95 -
On Sale
Cylinder Works Cylinder Head Kit 2004-2006 Suzuki RM-Z250 CH3002-K01
CYLINDER WORKS
MSRP: $685.95Now: $617.36Was: $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
MSRP: $685.95Now: $617.36Was: $685.95 -
On Sale
Cylinder Works Standard Bore Cylinder Yamaha YZ450F 2020 CW20014
CYLINDER WORKS
MSRP: $421.95Now: $379.76Was: $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
MSRP: $421.95Now: $379.76Was: $421.95
