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
$597.95A worn or damaged cylinder compromises ring seal, increases blowby, and degrades power output—issues that ripple through your entire engine. This MOOSE OFFROAD cylinder restores your Yamaha to OEM specifications with a precision-honed bore and advanced...09311074- SKU:
- 09311074
- Availability:
- Ships Same Business Day
- Weight:
- 6.15 LBS
$597.95 -
On Sale
Cylinder Works 66.4mm Cylinder for Yamaha YZ250 1999-2025 20009
CYLINDER WORKS
MSRP: $645.95Now: $581.36Was: $645.95If you're running a Yamaha YZ250 and want measurable gains in power and torque without engine teardown complexity, a big-bore cylinder is one of the most direct upgrades available. The Cylinder Works 66.4mm delivers the displacement increase your engine...09311078- SKU:
- 09311078
- Availability:
- Ships Same Business Day
- Weight:
- 6.06 LBS
MSRP: $645.95Now: $581.36Was: $645.95 -
On Sale
Cylinder Works Standard Bore Cylinder Kit 77mm Yamaha YZ250F 2019-2022 CW20013K01
CYLINDER WORKS
MSRP: $657.95Now: $592.16Was: $657.95When your YZ250F's cylinder shows signs of wear, you're losing compression, power delivery, and reliability on the track or trail. The Cylinder Works Standard Bore Kit restores your engine to peak performance with factory-matched specifications and...09311118- SKU:
- 09311118
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
MSRP: $657.95Now: $592.16Was: $657.95 -
Wossner Cylinder 47.00 mm KTM 85SX 2018-2025 WBC8147A
WOSSNER
$452.00A worn or damaged cylinder directly impacts your 85's power delivery, throttle response, and fuel efficiency. The Wossner 47.00mm cylinder restores—or exceeds—OEM performance through precision engineering and premium materials, giving you the reliability...09311110- SKU:
- 09311110
- Availability:
- Ships Same Business Day
- Weight:
- 2.12 LBS
$452.00 -
On Sale
Cylinder Works Big Bore Cylinder Kit 295cc for Yamaha YZ250 1999-2023 21009-K01
CYLINDER WORKS
MSRP: $1,195.95Now: $1,076.36Was: $1,195.95The Cylinder Works Big Bore Kit transforms your YZ250 into a more potent machine by increasing displacement to 295cc—delivering measurable gains in mid-range and peak power without sacrificing the reliability you depend on for consistent track...09311163- SKU:
- 09311163
- Availability:
- Ships Same Business Day
- Weight:
- 8.71 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
MSRP: $1,195.95Now: $1,076.36Was: $1,195.95 -
MOOSE RACING Cylinder - Standard - KX250F MSE30012
MOOSE RACING
$402.95A worn or damaged cylinder directly undermines your KX250F's compression, throttle response, and overall reliability—especially if you're pushing hard on the track or trail. This MOOSE RACING replacement restores OEM performance specifications while...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
$427.95A worn or damaged cylinder directly compromises your YZ450F's compression, power delivery, and engine longevity. This MOOSE RACING replacement restores your bike to factory performance specs without modification or custom fabrication—just bolt it on and...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
$358.95A worn or damaged cylinder directly impacts compression, heat management, and overall engine reliability—three non-negotiables for consistent track performance or trail duty. The MOOSE RACING Cylinder restores your engine to OEM specifications with...09310974- SKU:
- 09310974
- Availability:
- Ships Same Business Day
- Weight:
- 2.36 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 MSE10001
MOOSE RACING
$340.95A worn or damaged cylinder directly impacts your engine's compression, power delivery, and longevity. The MOOSE RACING Standard Cylinder restores OEM performance specifications with a precision-machined bore and a nickel silicon carbide plating that...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
$487.95A worn or damaged cylinder directly compromises compression, power delivery, and engine reliability. The MOOSE RACING Standard Cylinder restores OEM performance with a precision-machined bore and a hardened nickel silicon carbide coating that resists...09310970- SKU:
- 09310970
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 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
$402.95A worn or damaged cylinder directly compromises your engine's compression, power delivery, and reliability. This MOOSE RACING replacement restores OEM performance with a precision-honed bore and advanced plating that resists wear and dissipates heat more...09310971- SKU:
- 09310971
- Availability:
- Ships Same Business Day
- Weight:
- 2.51 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 MSE20001
MOOSE RACING
$380.95A worn or damaged cylinder compromises compression, power delivery, and engine reliability—especially under racing conditions where tolerances matter. The MOOSE RACING Cylinder MSE20001 restores OEM performance with precision engineering and a durable...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
$402.95A damaged or worn cylinder directly kills your KX450F's performance and reliability. This MOOSE RACING replacement restores OEM-spec compression, heat management, and longevity without compromising your bike's original engineering. Get back to peak power...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
$474.95A worn or damaged cylinder directly compromises compression, power delivery, and engine longevity. The MOOSE RACING Cylinder restores your engine to factory specifications with precision manufacturing and a durable nickel silicon carbide-plated bore that...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
$402.95A worn or damaged cylinder directly impacts engine compression, throttle response, and overall reliability on the track or trail. The MOOSE RACING Cylinder restores OEM performance specifications with a durable, low-friction bore that dissipates heat...09310629- SKU:
- 09310629
- Availability:
- Ships Same Business Day
- Weight:
- 2.26 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
$372.95A worn or damaged cylinder compromises compression, increases blow-by, and forces your engine to work harder while delivering less power. The MOOSE RACING MSE10002 restores your engine to factory performance specifications with precision engineering and...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 -
MOOSE RACING Cylinder - Standard MSE10007
MOOSE RACING
$377.95A worn or damaged cylinder directly compromises your engine's compression, power delivery, and reliability—especially in high-performance applications. The MOOSE RACING MSE10007 cylinder restores OEM-spec bore geometry with a durable nickel silicon...09310447- SKU:
- 09310447
- Availability:
- Ships Same Business Day
- Weight:
- 2.66 LBS
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$377.95 -
MOOSE RACING Cylinder - Standard MSE20002
MOOSE RACING
$366.95A worn or damaged cylinder directly impacts compression, power delivery, and engine reliability—making replacement essential for any serious racer or mechanic. The MOOSE RACING MSE20002 delivers OEM-spec performance with superior durability, restoring...09310451- SKU:
- 09310451
- Availability:
- Ships Same Business Day
- Weight:
- 2.93 LBS
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$366.95 -
MOOSE RACING Cylinder - Standard MSE20003
MOOSE RACING
$380.95A worn or damaged cylinder directly compromises compression, power delivery, and engine reliability—especially under racing conditions. The MOOSE RACING MSE20003 restores OEM performance with a precision-honed bore and advanced nickel silicon carbide...09310452- SKU:
- 09310452
- Availability:
- Ships Same Business Day
- Weight:
- 3.45 LBS
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$380.95 -
MOOSE RACING Cylinder - Standard MSECW20013
MOOSE RACING
$364.95A worn or damaged cylinder compromises compression, efficiency, and overall engine reliability—especially under racing conditions. The MOOSE RACING Standard Cylinder restores your engine to OEM performance specifications with precision engineering and a...09310968- SKU:
- 09310968
- Availability:
- Ships Same Business Day
- Weight:
- 2.51 LBS
- BORE SIZE METRIC:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- GRAY
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$364.95
