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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LA Sleeve Cylinder Sleeve for Suzuki LT250R 1988-1992 FL5064
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5064, designed for optimal performance and longevity. Our high-quality replacement sleeves are engineered to restore the functionality of worn cylinders, ensuring a smooth and efficient...FL5064- SKU:
- FL5064
- Availability:
- Ships Same Business Day
- Weight:
- 2.19 LBS
- BORE SIZE METRIC:
- 67.00 MM
- COLOR/FINISH:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- CS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
$148.95Qty in Cart: 0Quantity:Price:$148.95Subtotal: -
LA Sleeve Cylinder Sleeve 1989-1990 Suzuki RM250 RMX250 67mm Bore FL5093
LA SLEEVE
$153.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5093, designed for optimal performance and durability. This high-quality replacement sleeve ensures a perfect fit and restores your cylinder's functionality, making it an essential component for...FL5093- SKU:
- FL5093
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- BORE SIZE METRIC:
- 67.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$153.95 -
L.A. Sleeve Cylinder Sleeve 47.50mm Bore Suzuki RM80 1991-2001 FL5140
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5140, designed for superior performance and durability. Crafted from high-quality materials, this replacement sleeve ensures a perfect fit and optimal functionality for your cylinders. Say...FL5140- SKU:
- FL5140
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- BORE SIZE METRIC:
- 47.50 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
$117.95 -
L.A. Sleeve Cylinder Sleeve for Suzuki RM-250 1991-1993 FL5182
LA SLEEVE
$153.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5182, designed for optimal performance and durability. This quality replacement sleeve ensures that your old cylinders can regain their efficiency and functionality, making it an essential...FL5182- SKU:
- FL5182
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- BORE SIZE METRIC:
- 67.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
$153.95 -
LA Sleeve Sleeve and Piston Kit Kawasaki KX85 2014-2019 LAS5778K
LA SLEEVE
$326.95Revitalize your Kawasaki's performance with the LA SLEEVE Sleeve and Piston Kit. Designed for optimal compatibility, this top-end rebuild solution enhances engine efficiency and power output. Experience improved compression and torque, ensuring your ride...09310861- SKU:
- 09310861
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- PRODUCT NAME:
- SLEEVE AND PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$326.95 -
On Sale
Cylinder Works Standard Bore Cylinder KTM 50 SX 2009-2023 CW50012
CYLINDER WORKS
MSRP: $434.95Now: $391.46Was: $434.95Upgrade your engine with the CYLINDER WORKS Standard CW50012, a high-performance replacement cylinder designed for seamless installation and superior durability. Crafted to match OEM specifications, this cylinder ensures optimal performance without the...09311022- SKU:
- 09311022
- Availability:
- Ships Same Business Day
- Weight:
- 2.61 LBS
- UNITS:
- EACH
- CYLINDER DIAMETER METRIC:
- 39.50 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER:
- 39,50 MM
- ENGINE TYPE:
- 2-CYCLE
- STYLE:
- STANDARD
MSRP: $434.95Now: $391.46Was: $434.95 -
On Sale
Cylinder Works Standard Bore Cylinder for Polaris RZR 900 2017-2020 CW60007
CYLINDER WORKS
MSRP: $696.95Now: $627.26Was: $696.95Experience unparalleled performance with the CYLINDER WORKS Standard CW60007, a ready-to-install, direct bolt-on cylinder designed to fit seamlessly into your engine setup. Crafted with precision, this cylinder mirrors the quality and appearance of OEM...09311023- SKU:
- 09311023
- Availability:
- Ships Same Business Day
- Weight:
- 7.16 LBS
- UNITS:
- EACH
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 93,00 MM
- PRODUCT NAME:
- CYLINDER
MSRP: $696.95Now: $627.26Was: $696.95 -
On Sale
Cylinder Works Yamaha WR250F 2018-2019 High Compression Cylinder Kit 20010-K02HC
CYLINDER WORKS
MSRP: $750.95Now: $675.86Was: $750.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for seamless installation, this kit combines durability with top-notch engineering, ensuring your bike runs smoother and quieter. With its OEM-like appearance and...09310709- SKU:
- 09310709
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
MSRP: $750.95Now: $675.86Was: $750.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for 2007-2008 Honda CRF450R 10002-K02
CYLINDER WORKS
MSRP: $651.95Now: $586.76Was: $651.95Elevate your motorcycle's performance with the CYLINDER WORKS Cylinder Kit, designed for a seamless fit with no need for re-plating. This high-quality kit not only mirrors the original equipment manufacturer (OEM) specifications but also enhances engine...09310839- SKU:
- 09310839
- Availability:
- Ships Same Business Day
- Weight:
- 4.71 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- COMPRESSION RATIO IMPERIAL:
- 12.1:1
MSRP: $651.95Now: $586.76Was: $651.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Honda CRF450R 2007-2019 10002-K02HC
CYLINDER WORKS
MSRP: $690.95Now: $621.86Was: $690.95Enhance your Honda's performance with the CYLINDER WORKS Big Bore Cylinder Kit. This ready-to-install kit is engineered for seamless integration, ensuring you get maximum power without the hassle of re-plating. Crafted with precision and quality...09310841- SKU:
- 09310841
- Availability:
- Ships Same Business Day
- Weight:
- 4.71 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- RIDING STYLE:
- OFF-ROAD
MSRP: $690.95Now: $621.86Was: $690.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit Arctic Cat 400 DVX 2004-2008 40001-K02
CYLINDER WORKS
MSRP: $717.95Now: $646.16Was: $717.95Upgrade your Arctic Cat with the Cylinder Works Cylinder Kit, designed for seamless installation and optimal performance. This kit includes everything you need for a hassle-free upgrade, ensuring your engine runs smoothly and efficiently. With...09310842- SKU:
- 09310842
- Availability:
- Ships Same Business Day
- Weight:
- 5.16 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- DISPLACEMENT:
- 400 CC
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ATV
MSRP: $717.95Now: $646.16Was: $717.95 -
On Sale
Cylinder Works Standard Bore High Compression Cylinder Kit for 2004-2008 Arctic Cat 400 DVX 40001-K02HC
CYLINDER WORKS
MSRP: $716.95Now: $645.26Was: $716.95Enhance your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. This ready-to-install kit is designed for seamless integration, offering a perfect fit that mirrors OEM specifications. With advanced materials and engineering, this kit...09310843- SKU:
- 09310843
- Availability:
- Ships Same Business Day
- Weight:
- 5.16 LBS
- DISPLACEMENT:
- 400 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- RIDING STYLE:
- ATV
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $716.95Now: $645.26Was: $716.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for 2018-2019 Honda CRF250R CW10011K01
CYLINDER WORKS
MSRP: $622.95Now: $560.66Was: $622.95Upgrade your Honda's performance with the Cylinder Works Cylinder Kit, designed for seamless installation and optimal functionality. This kit features high-quality components that mirror OEM specifications, ensuring a perfect fit and enhanced durability...09310845- SKU:
- 09310845
- Availability:
- Ships Same Business Day
- Weight:
- 3.46 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER:
- 79,00 MM
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- CYLINDER DIAMETER METRIC:
- 79.00 MM
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
MSRP: $622.95Now: $560.66Was: $622.95 -
On Sale
Cylinder Works High Compression Cylinder Kit Honda CRF250R 2018-2019 CW10011K01HC
CYLINDER WORKS
MSRP: $664.95Now: $598.46Was: $664.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for easy installation, this high-compression cylinder kit offers a seamless fit without the need for re-plating. Crafted in the USA, it combines durability with...09310846- SKU:
- 09310846
- Availability:
- Ships Same Business Day
- Weight:
- 3.41 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 79.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 14.6:1
- CYLINDER DIAMETER:
- 79,00 MM
MSRP: $664.95Now: $598.46Was: $664.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit Honda CRF250R 2018-2021 CRF250RX 2019-2021 CW11011K01
CYLINDER WORKS
MSRP: $787.95Now: $709.16Was: $787.95Enhance your Honda's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for effortless installation, this kit provides a powerful upgrade without the need for complex machining. Experience improved longevity and reduced engine noise with...09310847- SKU:
- 09310847
- Availability:
- Ships Same Business Day
- Weight:
- 3.16 LBS
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 270 CC
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 82,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- CYLINDER DIAMETER METRIC:
- 82.00 MM
MSRP: $787.95Now: $709.16Was: $787.95 -
On Sale
Cylinder Works Standard Bore Cylinder Yamaha YZ450F 2018-2019 CW20012
CYLINDER WORKS
MSRP: $461.95Now: $415.76Was: $461.95Upgrade your Yamaha with the Cylinder Works Standard Cylinder CW20012, designed for easy installation and optimal performance. This high-quality, direct bolt-on cylinder mirrors the specifications of OEM cylinders while enhancing durability with its...09310848- SKU:
- 09310848
- Availability:
- Ships Same Business Day
- Weight:
- 3.31 LBS
- PRODUCT NAME:
- CYLINDER
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
MSRP: $461.95Now: $415.76Was: $461.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit Yamaha YZ450F 2018-2019 CW20012K01
CYLINDER WORKS
MSRP: $788.95Now: $710.06Was: $788.95Upgrade 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:
- 4.56 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
MSRP: $788.95Now: $710.06Was: $788.95 -
On Sale
Cylinder Works 2019-2020 Yamaha WR 450 F High Compression Big Bore Cylinder Kit CW20012K01HC
CYLINDER WORKS
MSRP: $801.95Now: $721.76Was: $801.95Elevate 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:
- 4.51 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
MSRP: $801.95Now: $721.76Was: $801.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Yamaha YZ450F 2018-2019 CW21012K01
CYLINDER WORKS
MSRP: $991.95Now: $892.76Was: $991.95Upgrade 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:
- 4.31 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
MSRP: $991.95Now: $892.76Was: $991.95Qty in Cart: 0Quantity:Price:MSRP: $991.95Now: $892.76Was: $991.95Subtotal: -
On Sale
Cylinder Works Standard Bore Cylinder Kit for Polaris RZR 900 2017-2020 CW60007K02
CYLINDER WORKS
MSRP: $1,120.95Now: $1,008.86Was: $1,120.95Upgrade 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:
- 10.11 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
MSRP: $1,120.95Now: $1,008.86Was: $1,120.95
