Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Cylinder Works Standard Bore Cylinder Kit for Kawasaki KX250F 2004-2005 and Suzuki RM-Z250 2004-2006 30001-K01
CYLINDER WORKS
$686.95Elevate your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 30001-K01. This ready-to-install, direct bolt-on kit is designed to seamlessly replace your OEM cylinders, delivering...09310275- SKU:
- 09310275
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$686.95Qty in Cart: 0Quantity:Price:$686.95Subtotal: -
Cylinder Works Standard Bore Cylinder Kit for Kawasaki KX250F 2006-2008 30001-K02
CYLINDER WORKS
$686.95Enhance your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 30001-K02. This ready-to-install solution offers a seamless fit with OEM specifications, ensuring optimal functionality...09310276- SKU:
- 09310276
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
$686.95 -
Cylinder Works Standard Bore Cylinder Kit Yamaha YZ250F 2001-2004 20002-K01
CYLINDER WORKS
$750.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for effortless installation and optimal performance. This high-quality kit features components that mirror OEM specifications,...09310278- SKU:
- 09310278
- Availability:
- Ships Same Business Day
- Weight:
- 3.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.7:1
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$750.95Qty in Cart: 0Quantity:Price:$750.95Subtotal: -
Cylinder Works Yamaha YZ250F 2008-2013 Standard Bore Cylinder Kit 20002-K03
CYLINDER WORKS
$750.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for seamless installation and optimal performance. This complete kit features high-quality components that ensure durability and...09310281- SKU:
- 09310281
- Availability:
- Ships Same Business Day
- Weight:
- 3.62 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$750.95 -
Cylinder Works Standard Bore Cylinder Kit for Yamaha YZ450F 2006-2009 20003-K01
CYLINDER WORKS
$750.95Upgrade your engine with the CYLINDER WORKS Cylinder Kit, designed for effortless installation and optimal performance. These direct bolt-on cylinders mirror OEM specifications, ensuring a seamless...09310282- SKU:
- 09310282
- Availability:
- Ships Same Business Day
- Weight:
- 3.33 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER:
- 95,00 MM
- STYLE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-CYCLE
$750.95 -
Cylinder Works High Compression Cylinder Kit for Honda CRF150R 2007-2014 10004-K01HC
CYLINDER WORKS
$579.95Elevate your engine's performance with the High Compression Cylinder Kit. Designed for easy installation, this kit offers a seamless fit without the need for re-plating, ensuring a professional...09310288- SKU:
- 09310288
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- CYLINDER DIAMETER:
- 66,00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 12.2:1
- CYLINDER DIAMETER METRIC:
- 66.00 MM
- DISPLACEMENT:
- 149 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$579.95Qty in Cart: 0Quantity:Price:$579.95Subtotal: -
Cylinder Works High Compression Cylinder Kit for Honda CRF250X 2016-2017 10001-K01HC
CYLINDER WORKS
$635.95Upgrade your engine with the CYLINDER WORKS High Compression Cylinder Kit, designed for effortless installation and optimal performance. This direct bolt-on solution mirrors the quality of OEM...09310289- SKU:
- 09310289
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- CYLINDER DIAMETER:
- 78,00 MM
- STYLE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER METRIC:
- 78.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
$635.95 -
MOOSE RACING Engine Oil Seal Kit - Honda 822357
MOOSE RACING
$59.71Engine oil seals deteriorate over time, leading to slow leaks that compromise oil pressure, increase consumption, and accelerate internal wear. This complete seal kit eliminates guesswork by...09351027- SKU:
- 09351027
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- ENGINE
- TYPE:
- OIL
$59.71Qty in Cart: 0Quantity:Price:$59.71Subtotal: -
MOOSE RACING Oil Seal Set - Honda 822378
MOOSE RACING
$37.56Engine seal degradation is one of the most common sources of oil leakage and contamination in high-mileage Honda engines. This complete oil seal set eliminates the guesswork of sourcing individual...09351052- SKU:
- 09351052
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- OIL
- UNITS:
- KIT
- APPLICATION:
- ENGINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
$37.56Qty in Cart: 0Quantity:Price:$37.56Subtotal: -
MOOSE RACING Oil Seal Set - Kawasaki 822379
MOOSE RACING
$28.85Engine seal degradation is one of the most common culprits behind oil leaks, reduced compression, and premature wear in high-performance applications. This comprehensive MOOSE RACING Oil Seal Set...09351053- SKU:
- 09351053
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
$28.85 -
MOOSE RACING Oil Seal Set - Yamaha 822994
MOOSE RACING
$28.85Includes every seal in a engine including crank shaft seals, Does not include valve stem seal, Made in the USA09351055- SKU:
- 09351055
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$28.85 -
On Sale
Pro Circuit Oil Filter Cover for Kawasaki KX450F 2016-2025 PC4009-0015
PRO CIRCUIT
MSRP: $39.95Now: $35.96Was: $39.95Upgrade your KX450F with the PRO CIRCUIT Oil Filter Cover, crafted from premium aircraft-grade aluminum for unparalleled durability and performance. Its stunning mirror finish, combined with an...09401492- SKU:
- 09401492
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILTER
- COLOR/FINISH:
- MIRROR
MSRP: $39.95Now: $35.96Was: $39.95 -
ProFilter Oil Filter for Honda CB1000R 2011-2016 PF-204B
PRO FILTER
$12.99Experience superior engine protection with the PRO FILTER Replacement Oil Filter PF-204B. Designed for high performance, this filter ensures optimal flow rates and durability, making it the perfect...07120609- SKU:
- 07120609
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BASE COLOR:
- BLACK
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- PREMIUM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- COLOR/FINISH:
- BLACK
$12.99Qty in Cart: 0Quantity:Price:$12.99Subtotal: -
Pro Filter Oil Filter for Honda CB500X 2014-2019 PF-204C
PRO FILTER
$16.99Enhance your engine's performance with the PRO FILTER Replacement Oil Filter PF-204C, designed for high efficiency and reliability. This premium filter features advanced micro-pore filtration...07120610- SKU:
- 07120610
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- STYLE:
- PREMIUM
$16.99 -
Pro Filter Oil Filter for Honda CB1000 1994-1995 PF-303C
PRO FILTER
$17.99Experience superior engine protection with the PRO FILTER Replacement Oil Filter PF-303C. Designed to meet and exceed OEM specifications, this high-performance filter ensures optimal filtration and...07120612- SKU:
- 07120612
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- STYLE:
- PREMIUM
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
$17.99 -
Pro Filter Replacement Oil Filter for 1983 Honda CB1000C Custom PF-401
PRO FILTER
$8.99Upgrade your engine's performance with the PRO FILTER Replacement Oil Filter PF-401. Designed to meet and exceed OEM specifications, this high-performance filter ensures optimal filtration and flow...07120613- SKU:
- 07120613
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- FEATURES:
- COMPLETE CHANGE KIT
- PRODUCT NAME:
- OIL FILTER
- STYLE:
- PREMIUM
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$8.99Qty in Cart: 0Quantity:Price:$8.99Subtotal: -
On Sale
Wiseco Ring Set 75.50mm Honda XR250R 1986-2004 2973XC
WISECO
MSRP: $49.95Now: $42.00Was: $49.95The Wiseco Ring Set 2973XC is engineered to restore proper ring seal and compression in your Honda XR250R, which directly impacts throttle response, fuel efficiency, and engine longevity. Worn or...2973XC- SKU:
- 2973XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 75.50 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco 75.50mm Ring Set for Kawasaki ZX1000 Ninja 1000R 1986-1987 2973XG
WISECO
MSRP: $50.51Now: $42.00Was: $50.51Maintaining proper ring seal is critical for maximizing compression, controlling blow-by, and preserving ring groove integrity in your ZX1000 engine. The Wiseco 2973XG Ring Set delivers...2973XG- SKU:
- 2973XG
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- BORE SIZE METRIC:
- 75.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
MSRP: $50.51Now: $42.00Was: $50.51Qty in Cart: 0Quantity:Price:MSRP: $50.51Now: $42.00Was: $50.51Subtotal: -
On Sale
Wiseco Ring Set 75.00mm 2010-2011 BMW S1000RR 2953XG
WISECO
MSRP: $52.95Now: $42.00Was: $52.95Piston ring integrity is critical to engine sealing, compression, and longevity—degraded or worn rings lead to blow-by, oil consumption, and power loss. The Wiseco 2953XG ring set delivers...2953XG- SKU:
- 2953XG
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- DISPLACEMENT:
- 250 CC
- BORE SIZE METRIC:
- 75.00 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
MSRP: $52.95Now: $42.00Was: $52.95 -
On Sale
Wiseco Piston Kit Kawasaki KX250 2002-2004 799M06750
WISECO
MSRP: $221.95Now: $157.00Was: $221.95The factory piston in your KX250 is a wear item with a finite lifespan—once it starts to degrade, throttle response suffers and power output drops noticeably. Wiseco's precision-engineered piston kit...09101242- SKU:
- 09101242
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- +1,10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +1.10 MM
- DISPLACEMENT:
- 249,3 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $221.95Now: $157.00Was: $221.95
