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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MOOSE OFFROAD Cylinder - 66.40 mm - Yamaha MSE20009
MOOSE OFFROAD
$597.95Cylinder - 66.40 mm - Yamaha Precision diamond honed to exact bore dimension and proper surface finish to ensure ring and oil retention, Extremely durable low-friction bore surface allows for greater heat dissipation, Made from cast aluminum; nickel...09311074- SKU:
- 09311074
- Availability:
- Ships Same Business Day
- Weight:
- 6.15 LBS
$597.95 -
Cylinder Works 66.4mm Cylinder for Yamaha YZ250 1999-2025 20009
CYLINDER WORKS
$597.95Upgrade your Yamaha's performance with our premium 66.40 mm ready-to-install cylinder. Designed for seamless integration, this direct bolt-on solution eliminates the need for re-plating and ensures a perfect match with your OEM components. Crafted in the...09311078- SKU:
- 09311078
- Availability:
- Ships Same Business Day
- Weight:
- 6.06 LBS
$597.95 -
Cylinder Works Standard Bore Cylinder 77mm Yamaha YZ250F 2019 CW20013
CYLINDER WORKS
$364.95Upgrade your Yamaha with our high-performance 77.00 mm cylinder, designed for effortless installation and optimal performance. This direct bolt-on replacement mirrors the original equipment manufacturer (OEM) specifications, ensuring a seamless fit and...09311117- SKU:
- 09311117
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
$364.95 -
Cylinder Works Standard Bore Cylinder Kit 77mm Yamaha YZ250F 2019-2022 CW20013K01
CYLINDER WORKS
$608.95Upgrade your Yamaha's performance with our Standard Bore Cylinder Kit, designed for effortless installation and optimal durability. Crafted to match OEM specifications, this kit includes high-quality Vertex pistons that enhance engine efficiency while...09311118- SKU:
- 09311118
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
$608.95 -
Wossner 47.01 mm Cylinder for KTM 85 SX 2018-2024 WBC8147B
WOSSNER
$452.00Introducing the high-performance cylinder designed specifically for KTM, Husqvarna, and GasGas 85 models. Crafted from aerospace-grade aluminum, this cylinder ensures exceptional durability and efficiency, making it the ideal upgrade for enthusiasts...09311111- SKU:
- 09311111
- Availability:
- Ships Same Business Day
- Weight:
- 2.12 LBS
$452.00 -
Wossner Cylinder 47.00 mm KTM 85SX 2018-2025 WBC8147A
WOSSNER
$452.00Discover the ultimate performance upgrade for your KTM, Husqvarna, or GasGas 85 with our precision-engineered cylinder. Crafted from aerospace-grade aluminum, this cylinder is designed for durability and efficiency, ensuring your bike runs at its best...09311110- SKU:
- 09311110
- Availability:
- Ships Same Business Day
- Weight:
- 2.12 LBS
$452.00 -
Cylinder Works Big Bore Cylinder Kit 295cc for Yamaha YZ250 1999-2023 21009-K01
CYLINDER WORKS
$1,106.95Upgrade your Yamaha with our high-performance Big Bore Cylinder Kit, designed for effortless installation and superior durability. This ready-to-install kit features OEM-like aesthetics and is engineered to enhance your engine's efficiency and...09311163- SKU:
- 09311163
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- GRAY
- CYLINDER DIAMETER:
- 72,00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- DISPLACEMENT:
- 295 CC
- OVERBORE METRIC:
- +5.60 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
$1,106.95 -
MOOSE RACING Cylinder - Standard - KX250F MSE30012
MOOSE RACING
$402.95MOOSE RACING Cylinder Standard KX250F MSE30012Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for...09310881- SKU:
- 09310881
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$402.95 -
MOOSE RACING Cylinder - Standard - YZ450F MSECW20012
MOOSE RACING
$427.95MOOSE RACING Cylinder Standard YZ450F MSECW20012Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows...09310882- SKU:
- 09310882
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- COLOR/FINISH:
- GRAY
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- STANDARD
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 97,00 MM
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- DISPLACEMENT:
- 450 CC
$427.95 -
MOOSE RACING Cylinder - Standard - Suzuki MSECW40005
MOOSE RACING
$358.95MOOSE RACING Cylinder Standard Suzuki MSECW40005Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows...09310974- SKU:
- 09310974
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- GRAY
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
$358.95 -
MOOSE RACING Cylinder - Standard - KX85 MSE30009
MOOSE RACING
$467.95MOOSE RACING Cylinder Standard KX85 MSE30009Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for...09310623- SKU:
- 09310623
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- CAST
- UNITS:
- EACH
$467.95Qty in Cart: 0Quantity:Price:$467.95Subtotal: -
MOOSE RACING Cylinder - Standard MSE10001
MOOSE RACING
$340.95MOOSE RACING Cylinder Standard MSE10001Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for greater...09310441- SKU:
- 09310441
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- MATERIAL:
- CAST
- UNITS:
- EACH
$340.95 -
MOOSE RACING Cylinder - Standard MSECW50008
MOOSE RACING
$487.95MOOSE RACING Cylinder Standard MSECW50008Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for...09310970- SKU:
- 09310970
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE SIZE METRIC:
- STANDARD
- COLOR/FINISH:
- GRAY
- CYLINDER DIAMETER:
- 88,00 MM
- CYLINDER DIAMETER METRIC:
- 88.00 MM
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- DISPLACEMENT:
- 350 CC
- RIDING STYLE:
- OFF-ROAD
$487.95 -
MOOSE RACING Cylinder - Standard MSECW50012
MOOSE RACING
$402.95MOOSE RACING Cylinder Standard MSECW50012Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for...09310971- SKU:
- 09310971
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE SIZE METRIC:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 39,50 MM
- ENGINE TYPE:
- 2-CYCLE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- GRAY
- CYLINDER DIAMETER METRIC:
- 39.50 MM
- DISPLACEMENT:
- 50 CC
- MATERIAL:
- CAST
$402.95 -
MOOSE RACING Cylinder - Standard MSE10006
MOOSE RACING
$402.95MOOSE RACING Cylinder Standard MSE10006Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for greater...09310446- SKU:
- 09310446
- Availability:
- Ships Same Business Day
- Weight:
- 3.23 LBS
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
$402.95 -
MOOSE RACING Cylinder - Standard MSE20001
MOOSE RACING
$380.95MOOSE RACING Cylinder Standard MSE20001Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for greater...09310450- SKU:
- 09310450
- Availability:
- Ships Same Business Day
- Weight:
- 3.44 LBS
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$380.95 -
MOOSE RACING Cylinder - Standard - KX450F MSE30011
MOOSE RACING
$402.95MOOSE RACING Cylinder Standard KX450F MSE30011Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for...09310625- SKU:
- 09310625
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- CAST
$402.95 -
MOOSE RACING Cylinder - Standard - KTM MSE50003
MOOSE RACING
$474.95MOOSE RACING Cylinder Standard KTM MSE50003Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for...09310627- SKU:
- 09310627
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- CAST
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER
$474.95 -
MOOSE RACING Cylinder - Standard - YZ250F MSE20010
MOOSE RACING
$402.95MOOSE RACING Cylinder Standard YZ250F MSE20010Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for...09310629- SKU:
- 09310629
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$402.95 -
MOOSE RACING Cylinder - Standard MSE10002
MOOSE RACING
$372.95MOOSE RACING Cylinder Standard MSE10002Replace your damaged or worn OEM cylinder, Made from cast aluminum; nickel silicon carbide plated, Precision-machined and honed to OEM stock bore sizes, Extremely durable low-friction bore surface allows for greater...09310442- SKU:
- 09310442
- Availability:
- Ships Same Business Day
- Weight:
- 3.51 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- CAST
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER
$372.95
