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!
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On Sale
Cylinder Works Front Cylinder Kit Kawasaki KVF750 Brute Force 2015-2021 30007-K02
CYLINDER WORKS
MSRP: $690.95Now: $621.86Was: $690.95If you're running a KVF750 Brute Force and want to restore or exceed factory cylinder performance without machine work, the Cylinder Works Front Cylinder Kit delivers a complete, bolt-on solution that's ready to install out of the box. Factory cylinders...09310609- SKU:
- 09310609
- Availability:
- Ships Same Business Day
- Weight:
- 5.05 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- CYLINDER DIAMETER:
- 85,00 MM
- CYLINDER DIAMETER METRIC:
- 85.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 749 CC
- PRODUCT NAME:
- FRONT CYLINDER KIT
MSRP: $690.95Now: $621.86Was: $690.95 -
On Sale
Cylinder Works High Compression Cylinder Kit for Polaris Ranger 800 2011-2014 60002-K02HC
CYLINDER WORKS
MSRP: $1,145.95Now: $1,031.36Was: $1,145.95Factory Polaris Ranger 800 engines leave performance on the table—this high-compression cylinder kit unlocks measurable gains in power and efficiency without requiring machine work or re-plating. By pairing a big-bore cylinder with matched Vertex pistons...09310617- SKU:
- 09310617
- Availability:
- Ships Same Business Day
- Weight:
- 10.30 LBS
- CYLINDER DIAMETER:
- 80,00 MM
- RIDING STYLE:
- UTV
- STYLE:
- HIGH COMPRESSION
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- DISPLACEMENT:
- 769 CC
- RIDING STYLE:
- ATV
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
MSRP: $1,145.95Now: $1,031.36Was: $1,145.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Kawasaki KX250F 2011-2014 31006-K01
CYLINDER WORKS
MSRP: $790.95Now: $711.86Was: $790.95Factory cylinders wear out—especially on high-revving 2-stroke competition bikes like the KX250F. The Cylinder Works Big Bore Kit restores lost compression and power while delivering the durability needed for consistent race-day performance. With matched...09310424- SKU:
- 09310424
- Availability:
- Ships Same Business Day
- Weight:
- 3.10 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 80,00 MM
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 269 CC
- OVERBORE METRIC:
- +3.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $790.95Now: $711.86Was: $790.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Yamaha YFZ450 2004-2013 23001-K01
CYLINDER WORKS
MSRP: $873.95Now: $786.56Was: $873.95If you're running a YFZ450 and want measurable gains in displacement, power, and torque without the hassle of custom machine work, this big bore kit delivers. The matched Vertex pistons and nickel silicon carbide-plated cylinder work together to reduce...09310425- SKU:
- 09310425
- Availability:
- Ships Same Business Day
- Weight:
- 4.57 LBS
- CYLINDER DIAMETER:
- 105,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- RIDING STYLE:
- ATV
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 105.00 MM
- OVERBORE METRIC:
- +3.00 MM
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.2:1
MSRP: $873.95Now: $786.56Was: $873.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Yamaha YZ450F 2003-2005 23001-K02
CYLINDER WORKS
MSRP: $873.95Now: $786.56Was: $873.95Stock cylinders wear down, robbing your YZ450F of power and reliability. This Cylinder Works big bore kit restores lost performance while maintaining factory aesthetics—no machine shop visits required. You get a complete, ready-to-install solution that...09310426- SKU:
- 09310426
- Availability:
- Ships Same Business Day
- Weight:
- 4.60 LBS
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 478 CC
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 98,00 MM
- OVERBORE METRIC:
- +3.00 MM
- UNITS:
- KIT
MSRP: $873.95Now: $786.56Was: $873.95 -
On Sale
CYLINDER WORKS Cylinder - Standard 10002
CYLINDER WORKS
MSRP: $402.95Now: $362.66Was: $402.95OEM cylinder wear compromises ring seal integrity and increases blowby, robbing you of power and reliability. The CYLINDER WORKS Standard 10002 delivers a factory-fresh bore with the durability of nickel silicon carbide plating—all without the downtime...09310129- SKU:
- 09310129
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- COMPRESSION RATIO IMPERIAL:
- 12.1:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 96,00 MM
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
MSRP: $402.95Now: $362.66Was: $402.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for Yamaha YZ250F 2005-2007 20002-K02
CYLINDER WORKS
MSRP: $395.95Now: $356.36Was: $395.95If you're running a 2005-2007 Yamaha YZ250F and want to restore or upgrade cylinder performance without machine shop downtime, the Cylinder Works Standard Bore Kit is your direct solution. The nickel silicon carbide plating significantly outlasts stock...09310131- SKU:
- 09310131
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE SIZE METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
MSRP: $395.95Now: $356.36Was: $395.95 -
On Sale
Cylinder Works Big Bore Kit Honda TRX450R 2004-2005 479cc 10.5:1 11003-K01
CYLINDER WORKS
MSRP: $809.95Now: $728.96Was: $809.95A big bore upgrade is one of the most effective ways to unlock additional displacement and power from your TRX450R without compromising reliability. The Cylinder Works 479cc kit delivers a straightforward bolt-on solution that combines precision...09310133- SKU:
- 09310133
- Availability:
- Ships Same Business Day
- Weight:
- 4.47 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- OVERBORE METRIC:
- +3.00 MM
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ATV
- CYLINDER DIAMETER:
- 97,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- DISPLACEMENT:
- 479 CC
- UNITS:
- KIT
MSRP: $809.95Now: $728.96Was: $809.95 -
On Sale
Cylinder Works Yamaha WR450F YFZ450R YZ450F 2007-2014 High Compression Cylinder Kit 20003-K01HC
CYLINDER WORKS
MSRP: $788.95Now: $710.06Was: $788.95If you're running a 2007-2014 Yamaha WR450F, YFZ450R, or YZ450F, a worn or damaged cylinder directly compromises compression, throttle response, and overall engine reliability. The Cylinder Works High Compression Cylinder Kit restores—and improves...09310299- SKU:
- 09310299
- Availability:
- Ships Same Business Day
- Weight:
- 4.38 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 95,00 MM
- STYLE:
- HIGH COMPRESSION
MSRP: $788.95Now: $710.06Was: $788.95 -
On Sale
Cylinder Works High Compression Cylinder Kit for Suzuki LT-R450 2006-2009 40002-K01HC
CYLINDER WORKS
MSRP: $743.95Now: $669.56Was: $743.95If you're serious about extracting more power from your LT-R450, a high-compression cylinder kit is one of the most effective bolt-on upgrades available. This Cylinder Works kit delivers a straightforward path to increased displacement and compression...09310303- SKU:
- 09310303
- Availability:
- Ships Same Business Day
- Weight:
- 4.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- HIGH COMPRESSION
- CYLINDER DIAMETER:
- 95,50 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 95.50 MM
- PRODUCT NAME:
- CYLINDER KIT
MSRP: $743.95Now: $669.56Was: $743.95 -
On Sale
Cylinder Works Big Bore Kit Yamaha YZ250F 2001-2013 21002-K01
CYLINDER WORKS
MSRP: $836.95Now: $753.26Was: $836.95If you're running a YZ250F and want to unlock measurable gains in displacement and power output, a big bore kit is one of the most direct upgrades available. The Cylinder Works 21002-K01 delivers a complete, bolt-on solution that eliminates...09310121- SKU:
- 09310121
- Availability:
- Ships Same Business Day
- Weight:
- 3.37 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 269 CC
- OVERBORE METRIC:
- +3.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- CYLINDER DIAMETER:
- 80,00 MM
MSRP: $836.95Now: $753.26Was: $836.95 -
On Sale
CYLINDER WORKS Cylinder - Standard 30001
CYLINDER WORKS
MSRP: $410.95Now: $369.86Was: $410.95A worn or damaged cylinder can severely limit your engine's efficiency and reliability on the track or in the shop. The CYLINDER WORKS Standard 30001 delivers a ready-to-install replacement that matches OEM specifications without requiring costly...09310130- SKU:
- 09310130
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 77,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- BORE SIZE METRIC:
- 77.00 MM
- UNITS:
- EACH
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
Cylinder Works Standard Bore Cylinder for Yamaha YFZ450 2004-2009 2012-2013 20001
CYLINDER WORKS
MSRP: $410.95Now: $369.86Was: $410.95Your YFZ450's cylinder is the foundation of reliable power delivery—when it wears, you lose compression, efficiency, and overall engine performance. The Cylinder Works Standard Bore Cylinder (20001) is a direct bolt-on replacement that restores your...09310132- SKU:
- 09310132
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- CYLINDER DIAMETER:
- 95,00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
Cylinder Works Big Bore Kit for Suzuki DR-Z400 2000-2004 41001-K01
CYLINDER WORKS
MSRP: $837.95Now: $754.16Was: $837.95If you're running a stock DR-Z400, you're leaving power on the table. The Cylinder Works Big Bore Kit delivers a straightforward displacement increase with zero guesswork—everything you need arrives matched and ready to bolt on, so you can focus on...09310135- SKU:
- 09310135
- Availability:
- Ships Same Business Day
- Weight:
- 4.44 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- CYLINDER DIAMETER:
- 94,00 MM
- DISPLACEMENT:
- 434 CC
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- OVERBORE METRIC:
- +4.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 94.00 MM
- RIDING STYLE:
- ATV
MSRP: $837.95Now: $754.16Was: $837.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for Suzuki DR-Z400S 2000-2022 40001-K01
CYLINDER WORKS
MSRP: $440.95Now: $396.86Was: $440.95The stock cylinder on your DR-Z400S will eventually wear, leading to lost compression, increased blow-by, and sluggish performance. The Cylinder Works Standard Bore Cylinder Kit restores your engine to factory specifications with a bolt-on replacement...09310139- SKU:
- 09310139
- Availability:
- Ships Same Business Day
- Weight:
- 3.61 LBS
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- STREET
MSRP: $440.95Now: $396.86Was: $440.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for Honda CRF150R 2012-2020 11004-K02
CYLINDER WORKS
MSRP: $694.95Now: $625.46Was: $694.95If you're running a Honda CRF150R and want measurable gains in displacement and power output, a big bore kit is one of the most direct paths forward. The Cylinder Works 11004-K02 delivers bolt-on simplicity without sacrificing the precision fit and...09310485- SKU:
- 09310485
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 68,00 MM
- DISPLACEMENT:
- 159 CC
- OVERBORE METRIC:
- +2.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- STYLE:
- BIG BORE
- CYLINDER DIAMETER METRIC:
- 68.00 MM
- ENGINE TYPE:
- 4-CYCLE
MSRP: $694.95Now: $625.46Was: $694.95 -
On Sale
Cylinder Works Big Bore Cylinder Kit for 2009-2015 Kawasaki KX450F 31011-K01
CYLINDER WORKS
MSRP: $786.95Now: $708.26Was: $786.95If you're serious about extracting maximum displacement from your KX450F, the Cylinder Works Big Bore Kit delivers tangible power gains without the machine shop hassle. This bolt-on upgrade pairs a nickel silicon carbide-plated cylinder with Vertex...09310603- SKU:
- 09310603
- Availability:
- Ships Same Business Day
- Weight:
- 3.95 LBS
- DISPLACEMENT:
- 469 CC
- OVERBORE METRIC:
- +2.00 MM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- CYLINDER DIAMETER:
- 98,00 MM
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-CYCLE
MSRP: $786.95Now: $708.26Was: $786.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit for Polaris RZR XP 900 2011-2013 60001-K02
CYLINDER WORKS
MSRP: $1,204.95Now: $1,084.46Was: $1,204.95When your RZR XP 900's engine is ready for more, a complete cylinder kit eliminates the guesswork and delivers measurable gains in displacement and reliability. This Cylinder Works kit arrives as a true bolt-on solution—no machine work, no...09310657- SKU:
- 09310657
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- CYLINDER DIAMETER:
- 93,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 875 CC
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
MSRP: $1,204.95Now: $1,084.46Was: $1,204.95 -
On Sale
Cylinder Works Honda CRF450X 2005-2017 Standard Bore Cylinder 10008
CYLINDER WORKS
MSRP: $421.95Now: $379.76Was: $421.95Upgrade your ride with the CYLINDER WORKS Cylinder Standard 10008, designed for seamless installation and optimal performance. This direct bolt-on cylinder mirrors the quality and appearance of OEM cylinders, ensuring a perfect fit without the need for...09311013- SKU:
- 09311013
- Availability:
- Ships Same Business Day
- Weight:
- 3.51 LBS
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- CYLINDER DIAMETER:
- 96,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
MSRP: $421.95Now: $379.76Was: $421.95 -
On Sale
Cylinder Works Cylinder Head Kit Kawasaki KX250F 2006-2008 CH3001-K01
CYLINDER WORKS
MSRP: $688.95Now: $620.06Was: $688.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Head Kit. Designed for enthusiasts seeking enhanced power and efficiency, this kit features precision-engineered components that ensure optimal airflow and combustion. Crafted in the U.S...09311018- SKU:
- 09311018
- Availability:
- Ships Same Business Day
- Weight:
- 5.51 LBS
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $688.95Now: $620.06Was: $688.95
