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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On Sale
Cylinder Works Big Bore Cylinder Kit 2020-2022 KTM 350 EXC-F CW51008K01
CYLINDER WORKS
MSRP: $885.95Now: $797.36Was: $885.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit CW51008K01. Designed for seamless installation, this kit provides an exceptional upgrade over OEM cylinders, enhancing both power and efficiency without the need for complex...09310967- SKU:
- 09310967
- Availability:
- Ships Same Business Day
- Weight:
- 4.60 LBS
- OVERBORE IMPERIAL:
- +2.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- DISPLACEMENT:
- 366 CC
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- STREET
MSRP: $885.95Now: $797.36Was: $885.95Qty in Cart: 0Quantity:Price:MSRP: $885.95Now: $797.36Was: $885.95Subtotal: -
On Sale
Cylinder Works Standard Bore Cylinder KTM 65 SX 2009-2022 50005
CYLINDER WORKS
MSRP: $631.95Now: $568.76Was: $631.95Upgrade your engine with the Cylinder Works Standard 50005, a high-performance, ready-to-install direct bolt-on cylinder. Engineered for durability and precision, this cylinder offers a seamless fit and exceptional longevity, ensuring your machine...09311015- SKU:
- 09311015
- Availability:
- Ships Same Business Day
- Weight:
- 2.51 LBS
- ENGINE TYPE:
- 2-CYCLE
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 45,00 MM
- CYLINDER DIAMETER METRIC:
- 45.00 MM
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
MSRP: $631.95Now: $568.76Was: $631.95 -
On Sale
Cylinder Works High Compression Cylinder Kit Yamaha YZ250F 2001-2007 20002-K01HC
CYLINDER WORKS
MSRP: $750.95Now: $675.86Was: $750.95Elevate your engine's performance with the Cylinder Works High Compression Cylinder Kit. Designed for easy installation, this kit combines advanced engineering with premium materials to deliver exceptional durability and power. Experience seamless...09310296- SKU:
- 09310296
- Availability:
- Ships Same Business Day
- Weight:
- 3.33 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
MSRP: $750.95Now: $675.86Was: $750.95Qty in Cart: 0Quantity:Price:MSRP: $750.95Now: $675.86Was: $750.95Subtotal: -
LA Sleeve Cylinder Sleeve 54.25mm Bore 1999-2000 KTM 125 SX FL5404
LA SLEEVE
$137.95Revitalize 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 optimal fit and durability, making...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
$137.95Qty in Cart: 0Quantity:Price:$137.95Subtotal: -
LA Sleeve Cylinder Sleeve for Honda CRF450R 2004-2008 CRF450X 2005-2017 TRX450R 2006-2014 H5537
LA SLEEVE
$144.95Revitalize 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 efficiency. Upgrade your...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 2004-2006 KTM 125 SX FL5553
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5553, designed for optimal performance and durability. This high-quality replacement sleeve provides a reliable solution for restoring old cylinders, ensuring your engine runs smoothly and...09310261- SKU:
- 09310261
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
$131.95Qty in Cart: 0Quantity:Price:$131.95Subtotal: -
LA Sleeve Cylinder Sleeve 2008 Suzuki RM-Z450 FL5693
LA SLEEVE
$159.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5693, designed to restore the performance of worn-out cylinders. Crafted from high-quality materials, this replacement sleeve ensures durability and precision fit for optimal engine function...09310639- SKU:
- 09310639
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- BORE SIZE METRIC:
- 66.40 MM
- COLOR/FINISH:
- CHROME
$159.95Qty in Cart: 0Quantity:Price:$159.95Subtotal: -
LA SLEEVE Cylinder Sleeve Yamaha YFB 250 1990-2000 YA5101
LA SLEEVE
$112.95Premium Replacement Cylinder Sleeves YA5101 Revive your engine's performance with our top-of-the-line replacement cylinder sleeves. Crafted for exceptional quality and precision, these sleeves offer an ideal solution for restoring the functionality of...YA5101- SKU:
- YA5101
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- TYPE:
- RS
- COLOR/FINISH:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE SIZE METRIC:
- 71.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
$112.95Qty in Cart: 0Quantity:Price:$112.95Subtotal: -
LA Sleeve Cylinder Sleeve for Yamaha YZ85 2002-2022 YA5476
LA SLEEVE
$117.95Premium Replacement Cylinder Sleeves YA5476 Revitalize your machinery with our Premium Replacement Cylinder Sleeves, designed to restore performance and reliability. Crafted with precision and built to last, these sleeves provide an excellent solution...YA5476- SKU:
- YA5476
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CYLINDER SLEEVE
- UNITS:
- EACH
- BORE SIZE METRIC:
- 47.40 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$117.95 -
LA Sleeve Cylinder Sleeve for Kawasaki KDX200 1989-1994 KA5086
LA SLEEVE
$137.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5086, designed to provide superior performance and durability. This high-quality replacement sleeve ensures a precise fit, allowing your engine to operate at its best. Ideal for those looking to...KA5086- SKU:
- KA5086
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 66.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
$137.95Qty in Cart: 0Quantity:Price:$137.95Subtotal: -
LA Sleeve Cylinder Sleeve for 1992 Kawasaki KX250 66.40mm Bore KA5153
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5153, designed for optimal performance and durability. This high-quality replacement sleeve ensures a perfect fit, restoring your old cylinders to their former glory. Engineered for reliability,...KA5153- SKU:
- KA5153
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- AC
- BORE SIZE METRIC:
- 66.40 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
$148.95Qty in Cart: 0Quantity:Price:$148.95Subtotal: -
LA Sleeve Cylinder Sleeve 54mm Bore Kawasaki KX125 1992 KA5154
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5154, designed to restore performance and extend the life of your cylinders. Crafted with precision and durability in mind, this replacement sleeve ensures a perfect fit and optimal...KA5154- SKU:
- KA5154
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 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
$131.95Qty in Cart: 0Quantity:Price:$131.95Subtotal: -
LA Sleeve Cylinder Sleeve for Kawasaki KDX200 1995-2006 KA5252
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5252, designed to restore performance and extend the life of your cylinders. Crafted with precision and durability in mind, this replacement sleeve ensures optimal fit and function for a...KA5252- SKU:
- KA5252
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- UNITS:
- EACH
- BORE SIZE METRIC:
- 66.00 MM
- COLOR/FINISH:
- CHROME
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- AC
- PRODUCT NAME:
- CYLINDER SLEEVE
$131.95 -
LA Sleeve Cylinder Sleeve Kawasaki KX-450F 2008-2010 KA5307
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5307, designed for exceptional performance and durability. This high-quality replacement sleeve ensures a perfect fit, allowing your old cylinders to regain their original functionality...KA5307- SKU:
- KA5307
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- BORE SIZE METRIC:
- 54.00 MM
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- AC
$131.95 -
LA Sleeve Cylinder Sleeve 48mm Bore Kawasaki KX80 1998-2000 KA5351
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5351, designed to restore performance and extend the life of your cylinders. Crafted from high-quality materials, this replacement sleeve ensures a perfect fit and superior durability, making it...KA5351- SKU:
- KA5351
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE METRIC:
- 48.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
$117.95 -
LA Sleeve Cylinder Sleeve for 1998-1999 Kawasaki KX125 54mm Bore KA5354
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5354, a premium quality replacement designed to restore performance and extend the life of your old cylinders. Crafted with precision, this cylinder sleeve ensures a perfect fit and optimal...KA5354- SKU:
- KA5354
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
$131.95Qty in Cart: 0Quantity:Price:$131.95Subtotal: -
LA Sleeve Cylinder Sleeve Kawasaki KX250 2001 66.40mm Bore KA5481
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5481, designed for optimal performance and durability. This high-quality replacement sleeve breathes new life into worn cylinders, ensuring reliable operation and extended engine life...KA5481- SKU:
- KA5481
- Availability:
- Ships Same Business Day
- Weight:
- 1.42 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- BORE SIZE METRIC:
- 66.40 MM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$148.95 -
LA Sleeve Cylinder Sleeve for 1990-1991 Honda CR250R H5105
LA SLEEVE
$148.95The LA SLEEVE Cylinder Sleeve H5105 is designed to rejuvenate your engine's performance by providing a high-quality replacement for worn-out cylinder sleeves. Engineered for durability and precision, this product ensures a perfect fit and optimal...H5105- SKU:
- H5105
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
- BORE SIZE METRIC:
- 66.40 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$148.95 -
LA Sleeve Cylinder Sleeve for Honda CR250R 1995-1996 H5250
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5250, designed for exceptional durability and performance. These high-quality replacement sleeves breathe new life into aging cylinders, ensuring optimal engine functionality. Perfect for both...H5250- SKU:
- H5250
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- BORE SIZE METRIC:
- 66.40 MM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$148.95 -
LA Sleeve Cylinder Sleeve 86mm Bore Honda TRX400FW 1995-2003 H5286
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5286, designed to restore performance and extend the life of your old cylinders. Crafted from high-quality materials, these replacement sleeves ensure a precise fit and optimal durability, making...H5286- SKU:
- H5286
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- COLOR/FINISH:
- ALUMINUM
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- CYLINDER SLEEVE
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- RS
- BORE SIZE METRIC:
- 86.00 MM
- UNITS:
- EACH
$117.95Qty in Cart: 0Quantity:Price:$117.95Subtotal:
