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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Cylinder Works Standard Bore Cylinder Kit for Polaris ACE 900 EPS 2016 60004-K02
CYLINDER WORKS
$1,060.95Upgrade your engine with the CYLINDER WORKS Standard Bore Cylinder, designed for seamless installation and superior performance. This ready-to-install solution features a perfect match with OEM specifications, ensuring a reliable fit and exceptional...09310734- SKU:
- 09310734
- Availability:
- Ships Same Business Day
- Weight:
- 9.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- STYLE:
- STANDARD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 93,00 MM
- DISPLACEMENT:
- STANDARD
- RIDING STYLE:
- UTV
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
$1,060.95Qty in Cart: 0Quantity:Price:$1,060.95Subtotal: -
Cylinder Works Standard Bore Cylinder Kit for Polaris RZR 900 2015-2016 60004
CYLINDER WORKS
$622.95Upgrade your engine with the CYLINDER WORKS Cylinder Standard 60004, designed for effortless installation and optimal performance. This high-quality, direct bolt-on cylinder matches the aesthetics of OEM cylinders while providing superior durability...09310733- SKU:
- 09310733
- Availability:
- Ships Same Business Day
- Weight:
- 7.15 LBS
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER:
- 93,00 MM
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
$622.95Qty in Cart: 0Quantity:Price:$622.95Subtotal: -
Cylinder Works Cylinder Kit Standard 40004-K02
CYLINDER WORKS
$652.95Elevate your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 40004-K02. This premium kit is designed for enthusiasts seeking a reliable, high-quality replacement that mirrors the original equipment manufacturer (OEM) specifications...09310502- SKU:
- 09310502
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 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
$652.95 -
Cylinder Works Big Bore Cylinder Kit for Suzuki RM-Z250 2013-2018 41004-K02
CYLINDER WORKS
$740.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for seamless installation, this kit offers an exceptional balance of power and durability, ensuring your ride performs at its best. Crafted in the U.S.A., it...09310501- SKU:
- 09310501
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 80,00 MM
- DISPLACEMENT:
- 269 CC
- OVERBORE METRIC:
- +3.00 MM
- UNITS:
- KIT
$740.95 -
Cylinder Works Standard Bore Cylinder Kit KTM 65 SX 2009-2023 50005-K01
CYLINDER WORKS
$730.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for effortless installation and superior performance. This ready-to-install kit features OEM-like aesthetics and unmatched durability, ensuring your ride runs smoothly and efficiently...09310500- SKU:
- 09310500
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- COMPRESSION RATIO IMPERIAL:
- 2.09:1
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER:
- 45,00 MM
- CYLINDER DIAMETER METRIC:
- 45.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- ENGINE TYPE:
- 2-CYCLE
- UNITS:
- KIT
- DISPLACEMENT:
- 65 CC
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
$730.95 -
Cylinder Works Standard Bore Cylinder Kit 2013-2015 KTM 350 SX-F 350 XC-F 50003-K01
CYLINDER WORKS
$803.95Experience superior performance and reliability with the CYLINDER WORKS Cylinder Kit. Designed for easy installation, this direct bolt-on solution mimics the quality of OEM cylinders while enhancing your engine's efficiency. Each kit is meticulously...09310497- SKU:
- 09310497
- Availability:
- Ships Same Business Day
- Weight:
- 3.85 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- CYLINDER DIAMETER:
- 88,00 MM
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 88.00 MM
- DISPLACEMENT:
- 350 CC
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$803.95 -
Cylinder Works Big Bore Cylinder Kit for 2013-2015 KTM 350 SX-F 35003-K01
CYLINDER WORKS
$909.95Enhance your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. This ready-to-install kit offers a seamless fit, eliminating the need for re-plating while delivering the durability and efficiency you expect from OEM components. Crafted...09310495- SKU:
- 09310495
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 90,00 MM
- DISPLACEMENT:
- 365 CC
- OVERBORE METRIC:
- +2.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
$909.95 -
Cylinder Works Yamaha YZ 450 F 2010-2013 High Compression Cylinder Kit 21005-K01
CYLINDER WORKS
$834.95Elevate your engine's performance with the CYLINDER WORKS High Compression Cylinder Kit. Designed for effortless installation, this kit offers an exact fit and enhanced durability, making it an ideal choice for enthusiasts seeking reliability and power...09310354- SKU:
- 09310354
- Availability:
- Ships Same Business Day
- Weight:
- 4.45 LBS
- CYLINDER DIAMETER METRIC:
- 99.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 468 CC
- STYLE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER DIAMETER:
- 99,00 MM
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$834.95 -
Cylinder Works Standard Bore Cylinder Kit 77mm 13.4:1 Compression Suzuki RM-Z250 2007-2009 40003-K01
CYLINDER WORKS
$652.95Experience unmatched performance and durability with the CYLINDER WORKS Cylinder Kit Standard 40003-K01. This ready-to-install kit offers a seamless fit with your OEM setup, ensuring a hassle-free upgrade for your engine. Crafted with precision, this...09310352- SKU:
- 09310352
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$652.95 -
Cylinder Works Big Bore Cylinder Kit Yamaha YZ85 2002-2018 103.5cc 21007-K01
CYLINDER WORKS
$885.95Upgrade your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for easy installation, this kit offers a seamless fit with no need for re-plating, ensuring your bike runs smoothly and efficiently. With high-quality components...09310346- SKU:
- 09310346
- Availability:
- Ships Same Business Day
- Weight:
- 3.60 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.2:1
- ENGINE TYPE:
- 2-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 103.5 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 52.50 MM
- CYLINDER DIAMETER:
- 52,50 MM
- OVERBORE METRIC:
- +5.00 MM
$885.95Qty in Cart: 0Quantity:Price:$885.95Subtotal: -
Cylinder Works Standard Bore Cylinder Kit 2010-2013 Yamaha YZ450F 20005-K01
CYLINDER WORKS
$744.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for easy installation and optimal performance. This ready-to-install kit features high-quality components that mirror OEM specifications, ensuring a seamless fit and enhanced durability...09310345- SKU:
- 09310345
- Availability:
- Ships Same Business Day
- Weight:
- 4.58 LBS
- CYLINDER DIAMETER:
- 97,00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- ENGINE TYPE:
- 4-CYCLE
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$744.95 -
Cylinder Works Suzuki RM-Z250 2010-2012 Standard Bore Cylinder Kit 40004-K01
CYLINDER WORKS
$652.95Experience unparalleled performance and reliability with the CYLINDER WORKS Cylinder Kit Standard 40004-K01. Designed as a direct bolt-on replacement, this ready-to-install kit ensures a seamless fit and exceptional durability without the need for...09310343- SKU:
- 09310343
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$652.95Qty in Cart: 0Quantity:Price:$652.95Subtotal: -
Cylinder Works Kawasaki KX250F 2010 Standard Bore Cylinder Kit 77mm 13.2:1 30005-K01
CYLINDER WORKS
$629.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for seamless installation and optimal performance. This ready-to-install kit combines high-quality components to enhance longevity and reduce engine noise, ensuring a smoother ride. With...09310341- SKU:
- 09310341
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$629.95 -
Cylinder Works Honda CRF 250R 2010-2017 Big Bore Cylinder Kit 270cc 11007-K01
CYLINDER WORKS
$702.95Upgrade your engine's performance effortlessly with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for a perfect fit, this ready-to-install kit enhances power and efficiency while maintaining the sleek look of OEM cylinders. Built with high-quality...09310340- SKU:
- 09310340
- Availability:
- Ships Same Business Day
- Weight:
- 3.68 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 270 CC
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 80,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
- OVERBORE METRIC:
- +3.20 MM
$702.95 -
Cylinder Works Standard Bore Cylinder Kit Honda CRF250R 2010-2013 10007-K01
CYLINDER WORKS
$553.95Elevate your engine's performance with the CYLINDER WORKS Cylinder Kit. Designed for seamless installation, this kit offers a reliable solution that mirrors the quality of OEM cylinders while enhancing durability and efficiency. With precision-engineered...09310338- SKU:
- 09310338
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 76,80 MM
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 76.80 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
$553.95 -
ATHENA Cylinder Kit - KX250F P400250100013
ATHENA
$1,105.30Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All are bolt-on; no machining required09310308- SKU:
- 09310308
- Availability:
- Ships Same Business Day
- Weight:
- 3.02 LBS
- BORE SIZE METRIC:
- 83.00 MM
- DISPLACEMENT:
- 290 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$1,105.30 -
Cylinder Works Kawasaki KX250F 2009 Standard Bore Cylinder Kit 30004-K01
CYLINDER WORKS
$629.95Experience enhanced performance and reliability with the Cylinder Works Cylinder Kit. This ready-to-install, direct bolt-on solution is designed to seamlessly replace your OEM cylinders, ensuring a perfect fit without the need for re-plating. Each kit...09310277- SKU:
- 09310277
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$629.95 -
Cylinder Works Standard Bore Cylinder Kit for 2002-2008 Honda CRF450R 10002-K01
CYLINDER WORKS
$603.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 10002-K01. This ready-to-install, direct bolt-on cylinder kit is designed for seamless integration, offering exceptional durability and efficiency without the need for...09310272- SKU:
- 09310272
- Availability:
- Ships Same Business Day
- Weight:
- 4.51 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.1:1
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- STYLE:
- STANDARD
$603.95 -
Cylinder Works Standard Bore Cylinder Kit Honda CRF250R 2008-2009 10001-K02
CYLINDER WORKS
$564.95Upgrade your engine performance with the CYLINDER WORKS Cylinder Kit Standard 10001-K02. Designed for easy installation, this kit offers a seamless fit and enhances the longevity of your motorcycle. With high-quality components and a focus on...09310271- SKU:
- 09310271
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- CYLINDER DIAMETER:
- 78,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 78.00 MM
$564.95 -
Cylinder Works Standard Bore Cylinder Kit Honda CRF450R 2017-2018 10001-K01
CYLINDER WORKS
$553.95Enhance your engine's performance with the CYLINDER WORKS Cylinder Kit, designed for easy installation and maximum durability. These high-quality, ready-to-install cylinders mirror the OEM design, ensuring a seamless fit and reliable operation. Each kit...09310270- SKU:
- 09310270
- Availability:
- Ships Same Business Day
- Weight:
- 4.32 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.9:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- CYLINDER DIAMETER:
- 78,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- STANDARD
$553.95
