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
-
LA Sleeve Cylinder Sleeve 66.40mm Bore Suzuki RM250 2006-2008 FL5629
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5629, designed for superior performance and durability. This high-quality replacement sleeve ensures a perfect fit, extending the life of your cylinders and enhancing engine efficiency. Upgrade...09310150- SKU:
- 09310150
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$148.95Qty in Cart: 0Quantity:Price:$148.95Subtotal: -
La Sleeve Sleeve and Piston Kit Yamaha YZ125 2002-2023 LAS-5476K
LA SLEEVE
$312.95Revitalize your Yamaha with the LA SLEEVE Sleeve and Piston Kit, engineered for optimal performance and durability. This comprehensive top-end rebuild kit combines advanced materials and precision engineering to enhance your engine's efficiency, ensuring...09310388- SKU:
- 09310388
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- MATERIAL:
- IRON
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- CAST
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- UNITS:
- KIT
$312.95Qty in Cart: 0Quantity:Price:$312.95Subtotal: -
LA Sleeve YZ125 2005-2017 Sleeve and Piston Kit LAS-5533K-1
LA SLEEVE
$360.95Upgrade your Yamaha's performance with the LA SLEEVE Sleeve and Piston Kit. This comprehensive top-end rebuild kit is designed to enhance engine efficiency, delivering improved compression, torque, and horsepower. With its advanced Moly2000 technology,...09310389- SKU:
- 09310389
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- MATERIAL:
- IRON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- CAST
$360.95 -
LA Sleeve Sleeve and Piston Kit Honda CR250R 2002-2003 LAS-5477K
LA SLEEVE
$422.95Revitalize your Honda's performance with the LA SLEEVE Sleeve and Piston Kit. This comprehensive top-end rebuild kit is engineered for optimal efficiency, delivering enhanced compression, increased torque, and improved horsepower. Whether you're racing...09310383- SKU:
- 09310383
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- MATERIAL:
- CAST
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- IRON
$422.95 -
LA Sleeve Honda CR250R 1999-2000 Cylinder Rebuild Kit LAS-5375K
LA SLEEVE
$422.95Elevate your bike's performance with the LA SLEEVE Sleeve and Piston Kit, designed specifically for Honda models. This all-in-one top-end rebuild kit features advanced materials to enhance compression, torque, and horsepower, ensuring a smoother and more...09310413- SKU:
- 09310413
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- MATERIAL:
- CAST
- MATERIAL:
- IRON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$422.95 -
LA Sleeve Suzuki RM125 2001-2003 Cylinder Rebuild Kit LAS-5420K-1
LA SLEEVE
$360.95Upgrade your Suzuki's performance with the LA SLEEVE Sleeve and Piston Kit. Designed for optimal efficiency, this comprehensive top-end rebuild kit enhances compression, torque, and horsepower, ensuring a smoother and more powerful ride. With...09310418- SKU:
- 09310418
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- MATERIAL:
- CAST
- MATERIAL:
- IRON
- TYPE:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$360.95Qty in Cart: 0Quantity:Price:$360.95Subtotal: -
LA Sleeve Sleeve and Piston Kit Yamaha YZ125 1999-2000 LAS-5378K
LA SLEEVE
$360.95Elevate your Yamaha's performance with the LA SLEEVE Sleeve and Piston Kit. This comprehensive top-end rebuild kit is designed to enhance compression, torque, and horsepower, ensuring your 2-stroke engine runs at its best. Featuring advanced materials...09310419- SKU:
- 09310419
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- MATERIAL:
- CAST
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- IRON
$360.95 -
LA Sleeve Cylinder Sleeve Kawasaki KX125 2000 KA5429
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5429, designed for superior performance and longevity. This high-quality replacement sleeve ensures a perfect fit and optimal sealing, bringing your old cylinders back to life. Engineered with...KA5429- SKU:
- KA5429
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
$131.95 -
LA Sleeve Cylinder Sleeve 48.50mm Bore Kawasaki KX85 2001-2013 KA5449
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5449, designed to provide a high-quality replacement for worn-out cylinders. Engineered for durability and performance, this sleeve ensures optimal fit and function, allowing your engine to...KA5449- SKU:
- KA5449
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- PRODUCT NAME:
- CYLINDER SLEEVE
- UNITS:
- EACH
- BORE SIZE METRIC:
- 48.50 MM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
$117.95Qty in Cart: 0Quantity:Price:$117.95Subtotal: -
LA Sleeve Cylinder Sleeve Kawasaki KX125 2002 KA5473
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5473, designed to restore the performance of worn-out cylinders. Crafted from high-quality materials, this replacement sleeve ensures durability and precision fit, making it an essential...KA5473- SKU:
- KA5473
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- BORE SIZE METRIC:
- 54.00 MM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$131.95 -
LA Sleeve Cylinder Sleeve for 2001 Honda CR125R H5450
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5450, designed for superior performance and longevity. This high-quality replacement sleeve ensures a perfect fit and optimal sealing, extending the life of your cylinders and enhancing overall...H5450- SKU:
- H5450
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- AC
$127.95 -
LA Sleeve Cylinder Sleeve 54mm Honda CR125R 2002 H5466
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5466, designed to restore the performance and longevity of your old cylinders. Crafted with precision and durability in mind, this replacement sleeve ensures a perfect fit and optimal...H5466- SKU:
- H5466
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- BORE SIZE METRIC:
- 54.00 MM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CYLINDER SLEEVE
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$127.95 -
LA Sleeve Cylinder Sleeve Honda CR250R 2002 2003 H5477
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5477, designed for optimal performance and longevity. This high-quality replacement sleeve is engineered to restore your old cylinders, ensuring a perfect fit and reliable operation. Upgrade your...H5477- SKU:
- H5477
- Availability:
- Ships Same Business Day
- Weight:
- 1.14 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 66.40 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
$148.95 -
Cylinder Works Standard Bore Cylinder Yamaha YZ250F 2014-2018 20010
CYLINDER WORKS
$434.95Experience unparalleled performance with the CYLINDER WORKS Cylinder Standard 20010, a direct bolt-on solution that seamlessly integrates with your existing setup. Engineered for durability and efficiency, this cylinder is designed to meet the highest...09310579- SKU:
- 09310579
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
$434.95 -
Cylinder Works Big Bore Cylinder Kit for 2015-2023 Kawasaki KVF750 Brute Force 4x4i 860cc 31007-K02
CYLINDER WORKS
$609.95Enhance your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. This ready-to-install kit offers a seamless fit, allowing you to upgrade without the need for complex machine work. Crafted in the U.S.A., it combines durability and...09310583- SKU:
- 09310583
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER:
- 76,80 MM
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 76.80 MM
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$609.95 -
Cylinder Works Standard Bore Cylinder Kit Yamaha YZ450F 2014-2017 20005-K02
CYLINDER WORKS
$804.95Upgrade your engine with the Cylinder Works Cylinder Kit, designed for seamless installation and optimal performance. This ready-to-install kit features a direct bolt-on design that mirrors OEM specifications, ensuring a perfect fit without the need for...09310585- SKU:
- 09310585
- Availability:
- Ships Same Business Day
- Weight:
- 4.55 LBS
- CYLINDER DIAMETER:
- 97,00 MM
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$804.95 -
Cylinder Works YZ 250 1999-2024 Standard Bore Cylinder Kit 20009-K01
CYLINDER WORKS
$842.95Upgrade your engine with the CYLINDER WORKS Standard Bore Cylinder Kit, designed for seamless installation and optimal performance. This kit offers a perfect blend of durability and efficiency, ensuring your engine runs smoothly while maintaining the...09310587- SKU:
- 09310587
- Availability:
- Ships Same Business Day
- Weight:
- 7.35 LBS
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$842.95 -
Cylinder Works High Compression Cylinder Kit for Honda CRF250R 2008-2009 10001-K02HC
CYLINDER WORKS
$645.95Upgrade your engine's performance with the High Compression Cylinder Kit, designed for effortless installation and optimal efficiency. Crafted with precision, this kit enhances power output while maintaining the reliability and aesthetics of OEM...09310290- SKU:
- 09310290
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- CYLINDER DIAMETER:
- 78,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- HIGH COMPRESSION
$645.95 -
LA Sleeve Cylinder Rebuild Kit for 2000-2006 Honda TRX350TE FourTrax Rancher ES LAS-5443K
LA SLEEVE
$312.95Transform your Honda's performance with the LA SLEEVE Sleeve and Piston Kit. This comprehensive top-end rebuild kit is engineered to enhance power and efficiency, featuring advanced materials and precision engineering for optimal performance. Experience...09310356- SKU:
- 09310356
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- MATERIAL:
- IRON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$312.95 -
LA Sleeve Cylinder Sleeve 85mm Bore Honda TRX400FA 2004-2007 H5630
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5630, designed to restore the performance of worn-out cylinders. Crafted from high-quality materials, this replacement sleeve ensures durability and reliability, making it an essential component...09310371- SKU:
- 09310371
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- RS
- BORE SIZE METRIC:
- 85.00 MM
- COLOR/FINISH:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$117.95
