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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On Sale
Wiseco Wrist Pin Arctic Cat Cheetah 500 F/C 1986-1988 S513
WISECO
MSRP: $22.99Now: $20.00Was: $22.99Unlock unparalleled performance with the Wiseco High-Tech Piston S513, meticulously engineered for both competitive racing and recreational use. This piston combines advanced materials and precision design, ensuring your engine operates at peak...S513- SKU:
- S513
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- PISTON
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER:
- 18,00 MM
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- LENGTH:
- 58,5 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- LENGTH METRIC:
- 58.5 MM
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER METRIC:
- 18.00 MM
MSRP: $22.99Now: $20.00Was: $22.99 -
On Sale
Wiseco Wrist Pin 1987-2005 Kawasaki KX125 S514
WISECO
MSRP: $22.99Now: $20.00Was: $22.99Experience unparalleled durability and precision with Wiseco's advanced piston technology. Engineered for superior strength and minimal thermal expansion, these pistons are designed to withstand extreme conditions while maximizing engine performance. ...S514- SKU:
- S514
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- OUTSIDE DIAMETER:
- 16,00 MM
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER METRIC:
- 16.00 MM
- LENGTH METRIC:
- 50.6 MM
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- WRIST PIN
- LENGTH:
- 50,6 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $22.99Now: $20.00Was: $22.99 -
On Sale
Wiseco Piston Kit Kawasaki KX250 1993-2001 RE926M06640
WISECO
MSRP: $249.95Now: $212.00Was: $249.95Unlock the full potential of your Kawasaki KX250 with the Wiseco Piston Kit - RE926M06640. Designed for high-performance riders, this piston kit combines cutting-edge technology with durable materials to deliver exceptional power and reliability on the...09105097- SKU:
- 09105097
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- TYPE:
- RACER ELITE
- BORE SIZE METRIC:
- 66.40 MM
- PISTON MATERIAL:
- FORGED
- SKIRT COATING:
- ARMORFIT™
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
MSRP: $249.95Now: $212.00Was: $249.95Qty in Cart: 0Quantity:Price:MSRP: $249.95Now: $212.00Was: $249.95Subtotal: -
On Sale
Wiseco Piston Kit with Gaskets Kawasaki KX250 1993-2001 PK1290
WISECO
MSRP: $269.95Now: $229.00Was: $269.95Unleash the full potential of your Kawasaki KX250 with the Wiseco Piston Kit PK1290. This high-performance kit is engineered for both competitive racers and casual riders, providing unmatched power and reliability for every ride. Precision CNC...09030254- SKU:
- 09030254
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +1,10 MM
- DISPLACEMENT:
- 249 CC
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 67.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE METRIC:
- +1.10 MM
- BORE SIZE METRIC:
- 67.50 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
MSRP: $269.95Now: $229.00Was: $269.95Qty in Cart: 0Quantity:Price:MSRP: $269.95Now: $229.00Was: $269.95Subtotal: -
On Sale
WISECO Piston - +1.00 mm - Honda ATC 250 R/TRX250R/CR250R 526M06700
WISECO
MSRP: $204.95Now: $174.00Was: $204.95Elevate your engine’s performance with the Wiseco Piston Kit. Engineered for superior strength and dependability, this kit is perfect for riders looking to maximize their ATV's power and longevity. Key Features: High-Silicon Aluminum Alloy: Forged...526M06700- SKU:
- 526M06700
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 67.00 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 72,00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
MSRP: $204.95Now: $174.00Was: $204.95Qty in Cart: 0Quantity:Price:MSRP: $204.95Now: $174.00Was: $204.95Subtotal: -
On Sale
Wiseco Piston Kit for Suzuki PE 125 1980-1984 490M06300
WISECO
MSRP: $154.95Now: $132.00Was: $154.95Transform your Suzuki PE 175 with the premium Wiseco Piston Kit, engineered for enhanced power and reliability. This high-performance piston is designed to elevate your riding experience, whether on the trails or the racetrack. High-Performance...490M06300- SKU:
- 490M06300
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- STROKE LENGTH:
- 57,00 MM
- BORE SIZE METRIC:
- 63.00 MM
- DISPLACEMENT:
- 172 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 57.00 MM
MSRP: $154.95Now: $132.00Was: $154.95Qty in Cart: 0Quantity:Price:MSRP: $154.95Now: $132.00Was: $154.95Subtotal: -
On Sale
Wiseco Piston Kit 56.00 mm Oversize for Yamaha YZ125 1997-2004 765M05600
WISECO
MSRP: $199.95Now: $170.00Was: $199.95Upgrade your Yamaha YZ125 with the Wiseco Piston Kit, designed for enthusiasts who seek exceptional performance and reliability. Crafted with precision engineering and top-tier materials, this piston kit is built to enhance your riding experience,...765M05600- SKU:
- 765M05600
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 54,50 MM
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 56.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- DISPLACEMENT:
- 134 CC
MSRP: $199.95Now: $170.00Was: $199.95Qty in Cart: 0Quantity:Price:MSRP: $199.95Now: $170.00Was: $199.95Subtotal: -
On Sale
Wiseco Piston Kit 41.50mm Oversize for Yamaha PW50 2021-2026 653M04150
WISECO
MSRP: $109.95Now: $93.00Was: $109.95Elevate your Yamaha PW50's performance with the Wiseco Piston Kit, engineered for optimal power and reliability. This high-performance piston is designed for riders who seek enhanced acceleration and durability, making every ride more exhilarating...653M04150- SKU:
- 653M04150
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE:
- +1,50 MM
- DISPLACEMENT:
- 49 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 39,20 MM
- STROKE LENGTH METRIC:
- 39.20 MM
- BORE SIZE METRIC:
- 41.50 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $109.95Now: $93.00Was: $109.95 -
On Sale
Wiseco Piston Kit Standard 67.50mm for KTM 250 SX 1995 655M06750
WISECO
MSRP: $199.95Now: $170.00Was: $199.95Transform your KTM 250 SX or 250 EXC with the high-performance Wiseco Piston Kit, designed for riders who seek unparalleled power and reliability. Engineered with advanced materials and precision machining, this piston kit enhances your bike's...601M06750- SKU:
- 601M06750
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249,6 CC
- STROKE LENGTH:
- 69,50 MM
- BORE SIZE METRIC:
- 67.50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 69.50 MM
- UNITS:
- EACH
MSRP: $199.95Now: $170.00Was: $199.95Qty in Cart: 0Quantity:Price:MSRP: $199.95Now: $170.00Was: $199.95Subtotal: -
On Sale
Wiseco Piston Kit Sea-Doo 3D 947 DI 2006-2007 WK1212
WISECO
MSRP: $469.95Now: $399.00Was: $469.95Elevate your Sea-Doo's performance with the Wiseco Piston Kit, engineered for those who demand excellence on the water. This top-end kit guarantees enhanced reliability and power, allowing you to tackle any aquatic adventure with confidence and vigor...09031171- SKU:
- 09031171
- Availability:
- Ships Same Business Day
- Weight:
- 4.25 LBS
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 960 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- BORE SIZE METRIC:
- 88.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 88.40 MM
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- TYPE:
- TOP END
MSRP: $469.95Now: $399.00Was: $469.95Qty in Cart: 0Quantity:Price:MSRP: $469.95Now: $399.00Was: $469.95Subtotal: -
On Sale
Wiseco Cam Chain Husqvarna FC450 2016-2018 CC032
WISECO
MSRP: $79.95Now: $68.00Was: $79.95Experience enhanced performance and longevity with the WISECO Cam Chain CC032. Crafted from high-quality materials, this chain minimizes friction and maximizes durability, ensuring reliable operation for your engine. Designed with precision engineering,...09250650- SKU:
- 09250650
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 92RH2015
- NUMBER OF LINKS:
- 108
MSRP: $79.95Now: $68.00Was: $79.95Qty in Cart: 0Quantity:Price:MSRP: $79.95Now: $68.00Was: $79.95Subtotal: -
On Sale
Wiseco Cam Chain KTM 500 XCF-W 2012-2016 CC036
WISECO
MSRP: $94.95Now: $81.00Was: $94.95Experience superior performance with the WISECO Cam Chain CC036, engineered for optimal strength and longevity. Crafted from high-quality materials, this chain minimizes friction and ensures a longer service life, making it an ideal choice for...09250654- SKU:
- 09250654
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- NUMBER OF LINKS:
- 114
- UNITS:
- EACH
- CHAIN SIZE:
- 92RH2015
- PRODUCT NAME:
- CHAIN
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM
MSRP: $94.95Now: $81.00Was: $94.95Qty in Cart: 0Quantity:Price:MSRP: $94.95Now: $81.00Was: $94.95Subtotal: -
On Sale
Wiseco Top End Bearing 20 x 25 x 21.8 mm for Polaris 440 Pro X 2001-2003 B1039
WISECO
MSRP: $23.99Now: $20.00Was: $23.99Engineered for peak performance, the WISECO Top End Bearing is crafted from high-silicon aluminum alloy, ensuring exceptional strength and reliability. Designed to meet the demands of high-speed engines, these bearings provide smooth operation and...09240124- SKU:
- 09240124
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- PISTON
- INSIDE DIAMETER METRIC:
- 20 MM
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER METRIC:
- 25 MM
- UNITS:
- EACH
- LENGTH METRIC:
- 21.8 MM
- PRODUCT NAME:
- BEARING
- MATERIAL:
- SILICONE
- RIDING STYLE:
- WATERCRAFT
MSRP: $23.99Now: $20.00Was: $23.99Qty in Cart: 0Quantity:Price:MSRP: $23.99Now: $20.00Was: $23.99Subtotal: -
On Sale
Wiseco Top End Bearing Kawasaki KX65 2000-2021 B1043
WISECO
MSRP: $23.99Now: $20.00Was: $23.99Engineered for superior performance, the WISECO Top End Bearing is crafted from a high-silicon aluminum alloy, ensuring exceptional strength and reliability. Designed to withstand the rigors of high-speed engine operations, this bearing guarantees a...09240125- SKU:
- 09240125
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- PISTON
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- INSIDE DIAMETER METRIC:
- 14.8 MM
- LENGTH METRIC:
- 12 MM
- MATERIAL:
- ALUMINUM
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER METRIC:
- 16 MM
MSRP: $23.99Now: $20.00Was: $23.99Qty in Cart: 0Quantity:Price:MSRP: $23.99Now: $20.00Was: $23.99Subtotal: -
On Sale
Wiseco Engine Rebuild Kit for Kawasaki KX80 1991-1997 PWR119-101
WISECO
MSRP: $474.95Now: $404.00Was: $474.95Revitalize your engine with the WISECO Engine Rebuild Kit PWR119-101, designed for both 4-stroke and 2-stroke applications. This comprehensive kit provides everything you need for a complete rebuild, ensuring optimal performance and reliability. Each...09031605- SKU:
- 09031605
- Availability:
- Ships Same Business Day
- Weight:
- 7.90 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
MSRP: $474.95Now: $404.00Was: $474.95Qty in Cart: 0Quantity:Price:MSRP: $474.95Now: $404.00Was: $474.95Subtotal: -
On Sale
Wiseco Engine Rebuild Kit Kawasaki KX80 1998-2000 PWR119-103
WISECO
MSRP: $474.95Now: $404.00Was: $474.95Upgrade your engine's performance with the WISECO Engine Rebuild Kit PWR119-103, designed for both 4-stroke and 2-stroke engines. This comprehensive kit includes all essential components for a complete rebuild, ensuring durability and reliability for...09031606- SKU:
- 09031606
- Availability:
- Ships Same Business Day
- Weight:
- 7.90 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 48.00 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- STANDARD
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $474.95Now: $404.00Was: $474.95Qty in Cart: 0Quantity:Price:MSRP: $474.95Now: $404.00Was: $474.95Subtotal: -
On Sale
Wiseco Garage Buddy Engine Rebuild Kit for 2016-2018 Yamaha YZ250F PWR216-101
WISECO
MSRP: $989.95Now: $841.00Was: $989.95Revitalize your engine with the WISECO PWR216-101 Rebuild Kit, designed for both 4-stroke and 2-stroke applications. This comprehensive kit ensures your engine operates at peak performance with high-quality components that meet rigorous durability...09031663- SKU:
- 09031663
- Availability:
- Ships Same Business Day
- Weight:
- 11.55 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- BORE SIZE METRIC:
- 77.00 MM
MSRP: $989.95Now: $841.00Was: $989.95Qty in Cart: 0Quantity:Price:MSRP: $989.95Now: $841.00Was: $989.95Subtotal: -
On Sale
Wiseco Piston Kit Standard Bore 56mm Yamaha YZ125 1990-1992 594M05600
WISECO
MSRP: $154.95Now: $132.00Was: $154.95Transform your riding experience with the Wiseco Piston Kit, engineered for performance enthusiasts seeking unparalleled precision and durability. This kit is meticulously crafted to enhance your engine's efficiency and power, ensuring you get the most...09101681- SKU:
- 09101681
- Availability:
- Ships Same Business Day
- Weight:
- 0.47 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 56.00 MM
- PRODUCT NAME:
- PISTON
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 50.70 MM
- UNITS:
- EACH
MSRP: $154.95Now: $132.00Was: $154.95Qty in Cart: 0Quantity:Price:MSRP: $154.95Now: $132.00Was: $154.95Subtotal: -
On Sale
Wiseco Piston Kit 95mm 12.5:1 Compression for Yamaha WR450F 2010-2015 PK1359
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Elevate your Yamaha YZ450F or WR450F with the Wiseco Piston Kit PK1359, engineered for riders seeking unparalleled performance and reliability. This premium piston kit combines cutting-edge materials with expert craftsmanship to transform your ride into...09030564- SKU:
- 09030564
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- BORE SIZE METRIC:
- 95.00 MM
- MODEL:
- FORGED SERIES
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 94.94 MM
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 63.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
MSRP: $344.95Now: $293.00Was: $344.95Qty in Cart: 0Quantity:Price:MSRP: $344.95Now: $293.00Was: $344.95Subtotal: -
On Sale
Wiseco Piston Kit for Honda XR250R 1986-2004 PK1224
WISECO
MSRP: $274.95Now: $234.00Was: $274.95Elevate your Honda's performance with the Wiseco Top End Kit PK1224. This meticulously crafted kit is designed for riders who seek exceptional power and reliability, making it perfect for both competitive racing and recreational riding. Experience...09030571- SKU:
- 09030571
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE - OVERSIZE METRIC:
- +5.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 59.50 MM
- TYPE:
- TOP END
- PISTON DIAMETER METRIC:
- 77.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +5,00 MM
- BORE SIZE METRIC:
- 78.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 250 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
MSRP: $274.95Now: $234.00Was: $274.95
