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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ATHENA Cylinder Kit - Kawasaki - Stock P400250100022
ATHENA
$772.95ATHENA Cylinder Kit Kawasaki Stock P400250100022Kits 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...09310961- SKU:
- 09310961
- Availability:
- Ships Same Business Day
- Weight:
- 4.40 LBS
- ENGINE TYPE:
- 4-STROKE
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 450 CC
- MATERIAL:
- ALUMINUM
- STYLE:
- STOCK BORE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$772.95 -
ATHENA Cylinder Kit - Yamaha - Stock P400485100076
ATHENA
$1,019.95ATHENA Cylinder Kit Yamaha Stock P400485100076Kits 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,...09310975- SKU:
- 09310975
- Availability:
- Ships Same Business Day
- Weight:
- 4.85 LBS
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- ALUMINUM
- STYLE:
- STOCK BORE
- BORE SIZE METRIC:
- 47.50 MM
- DISPLACEMENT:
- 85 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,019.95 -
ATHENA Cylinder Kit - CRF150R - 69mm P400210100023
ATHENA
$698.95ATHENA Cylinder Kit CRF150R 69mm P400210100023Kits 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,...09310307- SKU:
- 09310307
- Availability:
- Ships Same Business Day
- Weight:
- 3.14 LBS
- DISPLACEMENT:
- 163.5 CC
- ENGINE TYPE:
- 4-STROKE
- BORE SIZE METRIC:
- 69.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
$698.95 -
ATHENA Cylinder Kit - YZ250 - 72mm P400485100042
ATHENA
$1,784.95ATHENA Cylinder Kit YZ250 72mm P400485100042Kits 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,...09310440- SKU:
- 09310440
- Availability:
- Ships Same Business Day
- Weight:
- 9.00 LBS
- BORE SIZE METRIC:
- 72.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- DISPLACEMENT:
- 293 CC
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
$1,784.95 -
ATHENA Cylinder Kit - YZ85 - 105CC P400485100038
ATHENA
$976.95ATHENA Cylinder Kit YZ85 105CC P400485100038Kits 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,...09310473- SKU:
- 09310473
- Availability:
- Ships Same Business Day
- Weight:
- 4.33 LBS
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- BORE SIZE METRIC:
- 53.00 MM
- DISPLACEMENT:
- 105 CC
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- ALUMINUM
$976.95 -
LA Sleeve Sleeve and Piston Kit Kawasaki KX100 2014-2019 LAS5779K
LA SLEEVE
$326.95LA SLEEVE Sleeve and Piston Kit Kawasaki LAS5779K Upgrade your motorcycle's performance with the LA SLEEVE Sleeve and Piston Kit, designed specifically for Kawasaki models. This comprehensive kit offers an exceptional solution for top-end rebuilds,...09310862- SKU:
- 09310862
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SLEEVE AND PISTON KIT
$326.95 -
LA Sleeve Cylinder Sleeve 47.50mm Bore for 2003-2004 Honda CR85R CR85RB Expert H5488
LA SLEEVE
$133.95LA SLEEVE Cylinder Sleeve H5488 Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5488, designed for optimal performance and durability. This high-quality replacement sleeve ensures your cylinders operate like new, extending the life of your...09310001- SKU:
- 09310001
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE SIZE METRIC:
- 47.50 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
$133.95 -
LA Sleeve Cylinder Sleeve 95mm Yamaha YZ426F 2000-2002 YA5424
LA SLEEVE
$152.95LA SLEEVE Cylinder Sleeve YA5424 Revitalize your engine with the LA SLEEVE Cylinder Sleeve YA5424, designed to restore performance and extend the life of your old cylinders. Engineered for precision and durability, this replacement sleeve ensures a...09310011- SKU:
- 09310011
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- BORE SIZE METRIC:
- 95.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$152.95 -
LA Sleeve Cylinder Sleeve 54.25mm Bore 1999-2000 KTM 125 SX FL5404
LA SLEEVE
$159.95LA SLEEVE Cylinder Sleeve FL5404 Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5404, designed specifically to restore performance and extend the life of worn cylinders. Crafted from high-quality materials, this replacement sleeve ensures...09310031- SKU:
- 09310031
- Availability:
- Ships Same Business Day
- Weight:
- 0.72 LBS
- BORE SIZE METRIC:
- 54.25 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$159.95Qty in Cart: 0Quantity:Price:$159.95Subtotal: -
LA Sleeve Cylinder Sleeve 95mm Bore for KTM 520 2000-2002 FL5437
LA SLEEVE
$146.95LA SLEEVE Cylinder Sleeve FL5437 Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5437, designed for superior performance and durability. This high-quality replacement sleeve ensures a perfect fit, extending the life of your cylinders and...09310035- SKU:
- 09310035
- Availability:
- Ships Same Business Day
- Weight:
- 1.59 LBS
- BORE SIZE METRIC:
- 95.00 MM
- COLOR/FINISH:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$146.95 -
LA Sleeve Cylinder Sleeve for Suzuki RM85 2002-2022 FL5479
LA SLEEVE
$134.95LA SLEEVE Cylinder Sleeve FL5479 Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5479, designed for optimal performance and durability. These high-quality replacement sleeves breathe new life into old cylinders, ensuring a perfect fit and...09310039- SKU:
- 09310039
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 48.00 MM
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$134.95 -
LA Sleeve Cylinder Sleeve for Honda CR250R 2004 H5535
LA SLEEVE
$171.95LA SLEEVE Cylinder Sleeve H5535 Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5535, designed to restore performance and extend the life of your cylinders. Crafted with precision and durability in mind, this quality replacement sleeve ensures...09310152- SKU:
- 09310152
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- UNITS:
- EACH
$171.95 -
LA Sleeve Cylinder Sleeve 54mm Bore Honda CR125R 2005-2007 H5579
LA SLEEVE
$146.95LA SLEEVE Cylinder Sleeve H5579 Revitalize your engine with the LA SLEEVE H5579 Cylinder Sleeve, designed to restore performance and extend the life of your cylinders. Crafted from high-quality materials, these sleeves offer a perfect fit and exceptional...09310153- SKU:
- 09310153
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- AC
$146.95 -
LA Sleeve Cylinder Sleeve 66.40mm Bore Honda CR250R 2005-2007 H5580
LA SLEEVE
$171.95LA SLEEVE Cylinder Sleeve H5580 Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5580, designed for superior performance and durability. These high-quality replacement sleeves are engineered to restore old cylinders, ensuring optimal...09310154- SKU:
- 09310154
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
$171.95 -
LA Sleeve Cylinder Sleeve for Honda CRF450R 2004-2008 CRF450X 2005-2017 TRX450R 2006-2014 H5537
LA SLEEVE
$144.95LA SLEEVE Cylinder Sleeve H5537 Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5537, designed for optimal performance and durability. This high-quality replacement sleeve provides a perfect fit for worn-out cylinders, ensuring reliability and...09310155- SKU:
- 09310155
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- BORE SIZE METRIC:
- 96.00 MM
- COLOR/FINISH:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
$144.95Qty in Cart: 0Quantity:Price:$144.95Subtotal: -
LA Sleeve Cylinder Sleeve for 2002-2006 Polaris 600 Models 77.25mm FL1289
LA SLEEVE
$134.95LA SLEEVE Cylinder Sleeve KA5592 Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5592, designed for optimal performance and durability. This high-quality replacement sleeve ensures a perfect fit and restores the functionality of your old...09310159- SKU:
- 09310159
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- BORE SIZE METRIC:
- 85.00 MM
- COLOR/FINISH:
- ALUMINUM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- TYPE:
- AC
$134.95 -
LA Sleeve Cylinder Sleeve for Kawasaki KX100 2006-2013 KA5608
LA SLEEVE
$134.95LA SLEEVE Cylinder Sleeve KA5608 Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5608, designed for precision fit and enhanced performance. This high-quality replacement sleeve ensures optimal sealing and durability, giving your old cylinders...09310160- SKU:
- 09310160
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- AC
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 52.50 MM
- COLOR/FINISH:
- CHROME
$134.95 -
LA Sleeve Cylinder Sleeve Yamaha YZ125 2004-2021 YA5533
LA SLEEVE
$146.95LA SLEEVE Cylinder Sleeve YA5533 Revitalize your engine with the LA SLEEVE Cylinder Sleeve YA5533, designed for exceptional durability and performance. This high-quality replacement sleeve ensures a perfect fit, allowing your old cylinders to perform...09310161- SKU:
- 09310161
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 54.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
$146.95 -
LA Sleeve Cylinder Sleeve 97mm Honda XR600R 1991-2000 H5159
LA SLEEVE
$146.95LA SLEEVE Cylinder Sleeve H5159 Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5159, designed for quality and precision. This replacement sleeve ensures optimal performance and durability, making it an essential component for engine rebuilds...09310318- SKU:
- 09310318
- Availability:
- Ships Same Business Day
- Weight:
- 2.47 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- BORE SIZE METRIC:
- 97.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$146.95 -
LA SLEEVE Cylinder Sleeve for Honda XR650R 2000-2007 H5440
LA SLEEVE
$146.95LA SLEEVE Cylinder Sleeve H5440 Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5440, designed to restore performance and extend the life of your cylinders. Crafted with precision, this high-quality replacement sleeve ensures a perfect fit and...09310319- SKU:
- 09310319
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- BORE SIZE METRIC:
- 100.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$146.95
