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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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 eliminates guesswork by providing every critical seal your...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 -
Pro Circuit Oil Filter Cover for Kawasaki KX450F 2016-2025 PC4009-0015
PRO CIRCUIT
$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 anodized surface, not only enhances the aesthetic appeal but...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
$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 choice for both synthetic and petroleum-based oils...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
$12.99 -
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 technology, ensuring optimal oil flow and exceptional...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 flow rates, making it suitable for both synthetic 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 rates, making it ideal for both synthetic and...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
$8.99 -
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 incorrect ring sets allow blow-by and compression...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: $47.65Now: $42.00Was: $47.65Maintaining 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 precision-engineered construction that matches OEM specifications...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: $47.65Now: $42.00Was: $47.65 -
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 OEM-equivalent performance with the precision engineering...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 restores your engine to peak performance with...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 -
On Sale
Wiseco Piston Kit 67.5mm Honda CR250R 2002-2004 801M06750
WISECO
MSRP: $184.95Now: $157.00Was: $184.95If you're running a 2002-2004 CR250R and want to restore or upgrade your top-end performance, a quality piston kit is essential for maintaining compression, throttle response, and reliability. Wiseco's precision-engineered pistons are purpose-built for...09101243- SKU:
- 09101243
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +1.10 MM
- PISTON MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH METRIC:
- 72.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +1,10 MM
- BORE SIZE METRIC:
- 67.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $184.95Now: $157.00Was: $184.95 -
On Sale
Wiseco Piston Kit Yamaha YZ250 2002-2025 804M06700
WISECO
MSRP: $184.95Now: $157.00Was: $184.95When your YZ250's piston shows wear, you lose compression, efficiency, and the crisp power delivery that separates competitive rides from mediocre ones. Wiseco's precision-engineered piston kit restores your engine to optimal performance while...09101244- SKU:
- 09101244
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE SIZE METRIC:
- 67.00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +0.60 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,60 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
MSRP: $184.95Now: $157.00Was: $184.95Qty in Cart: 0Quantity:Price:MSRP: $184.95Now: $157.00Was: $184.95Subtotal: -
On Sale
Wiseco Piston Kit Yamaha YZ250 2002-2025 804M06750
WISECO
MSRP: $199.95Now: $157.00Was: $199.95The Wiseco Piston Kit for your YZ250/X delivers the reliability and performance consistency that separates competitive riders from the rest. A worn or damaged piston compromises throttle response, fuel efficiency, and engine longevity—this kit restores...09101245- SKU:
- 09101245
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- BORE - OVERSIZE:
- +1,10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE METRIC:
- +1.10 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $199.95Now: $157.00Was: $199.95 -
On Sale
Wiseco Piston Kit Standard 56mm Bore KTM 150 SX 2009-2015 869M05600
WISECO
MSRP: $184.95Now: $157.00Was: $184.95The stock piston in your 150 SX will eventually wear, losing compression and throttle response—a Wiseco replacement restores that crisp power delivery while providing the durability needed for consistent track days or trail riding. This...09102883- SKU:
- 09102883
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 56.00 MM
- DISPLACEMENT:
- 144 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 58.50 MM
MSRP: $184.95Now: $157.00Was: $184.95Qty in Cart: 0Quantity:Price:MSRP: $184.95Now: $157.00Was: $184.95Subtotal: -
On Sale
Wiseco Piston Kit Standard Bore 97mm 12.5:1 Compression Yamaha YZ450F 2010-2013 40001M09700
WISECO
MSRP: $239.95Now: $204.00Was: $239.95If you're running a YZ450F, piston wear directly impacts your engine's power delivery and reliability—and a quality replacement is non-negotiable for serious riders. The Wiseco Piston Kit delivers the compression ratio and durability you need to maintain...09102884- SKU:
- 09102884
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- STROKE LENGTH METRIC:
- 60.80 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 97.00 MM
- DISPLACEMENT:
- 449 CC
- PISTON MATERIAL:
- FORGED
MSRP: $239.95Now: $204.00Was: $239.95Qty in Cart: 0Quantity:Price:MSRP: $239.95Now: $204.00Was: $239.95Subtotal: -
On Sale
Wiseco Piston Kit Standard Bore 97mm 13.5:1 Compression Yamaha YZ450F 2010-2013 40002M09700
WISECO
MSRP: $269.95Now: $229.00Was: $269.95If you're running a YZ450F in competitive or high-demand recreational applications, piston wear directly impacts combustion efficiency and throttle response. This Wiseco piston kit delivers the precision-engineered replacement geometry and material...09102885- SKU:
- 09102885
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- STROKE LENGTH METRIC:
- 60.80 MM
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- BORE SIZE METRIC:
- 97.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
MSRP: $269.95Now: $229.00Was: $269.95 -
On Sale
Wiseco Piston Kit Honda CRF250R 2010-2013 76.80mm 13.2:1 40003M07680
WISECO
MSRP: $189.95Now: $161.00Was: $189.95When your CRF250R's piston shows wear, combustion efficiency drops—losing power exactly when you need it most. The Wiseco 76.80mm piston kit restores lost performance while delivering the durability required for consistent lap times and reliable trail...09102886- SKU:
- 09102886
- Availability:
- Ships Same Business Day
- Weight:
- 0.54 LBS
- BORE SIZE METRIC:
- 76.80 MM
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 53.80 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
MSRP: $189.95Now: $161.00Was: $189.95 -
On Sale
Wiseco Piston Kit Suzuki RM-Z250 2010-2023 40012M07700
WISECO
MSRP: $264.95Now: $225.00Was: $264.95Whether you're prepping for the gate or putting in lap time at the track, a worn or damaged piston compromises your RM-Z250's power delivery and engine longevity. The Wiseco Piston Kit delivers precision-engineered construction and optimal ring seal...09102892- SKU:
- 09102892
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- DISPLACEMENT:
- 250 CC
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 77.00 MM
- STROKE LENGTH METRIC:
- 53.60 MM
MSRP: $264.95Now: $225.00Was: $264.95Qty in Cart: 0Quantity:Price:MSRP: $264.95Now: $225.00Was: $264.95Subtotal: -
On Sale
Wiseco Piston Kit 88mm 14.5:1 Compression Husqvarna FE350 2020-2021 40015M08800
WISECO
MSRP: $279.95Now: $238.00Was: $279.95If you're rebuilding your FE350's top end or pushing higher boost levels, a quality piston kit is non-negotiable—OEM pistons wear quickly under aggressive use, while Wiseco's forged construction and optimized dome design deliver measurable gains in...09102894- SKU:
- 09102894
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 57.50 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 88.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- FORGED
MSRP: $279.95Now: $238.00Was: $279.95Qty in Cart: 0Quantity:Price:MSRP: $279.95Now: $238.00Was: $279.95Subtotal:
