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 77mm Piston Ring Set for Honda XR250R 1986-2004 3032XC
WISECO
MSRP: $49.95Now: $42.00Was: $49.95The WISECO Ring Set 3032XC is engineered for optimal performance and durability, designed specifically for one piston. This precision-crafted set ensures a perfect fit and enhances engine efficiency, making it an essential upgrade for any serious...09120118- SKU:
- 09120118
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 77.00 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- 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 Crankshaft Kit for 2005-2007 Suzuki RM-Z450 WPC142
WISECO
MSRP: $594.95Now: $506.00Was: $594.95Experience unparalleled performance with the WISECO Crankshaft, expertly crafted for superior reliability and efficiency. This comprehensive kit includes a top-end bearing, premium main bearings, and a complete bottom-end gasket set, ensuring you have...09210139- SKU:
- 09210139
- Availability:
- Ships Same Business Day
- Weight:
- 13.54 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.80 MM
- TYPE:
- BOTTOM END
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- UNITS:
- KIT
MSRP: $594.95Now: $506.00Was: $594.95Qty in Cart: 0Quantity:Price:MSRP: $594.95Now: $506.00Was: $594.95Subtotal: -
On Sale
Wiseco Crankshaft KTM 65 SX 2003-2008 WPC161A
WISECO
MSRP: $329.95Now: $280.00Was: $329.95The WISECO Crankshaft WPC161A is engineered for optimal performance and reliability. This comprehensive crankshaft kit includes everything you need for a seamless installation, ensuring your engine runs smoothly and efficiently. With precision components...09210547- SKU:
- 09210547
- Availability:
- Ships Same Business Day
- Weight:
- 6.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- STROKE LENGTH METRIC:
- 40.00 MM
MSRP: $329.95Now: $280.00Was: $329.95Qty in Cart: 0Quantity:Price:MSRP: $329.95Now: $280.00Was: $329.95Subtotal: -
On Sale
Wiseco Engine Rebuild Kit for 1997-2001 Honda CR250R PWR101-101
WISECO
MSRP: $664.95Now: $565.00Was: $664.95Revitalize your CR250 with the WISECO Engine Kit, meticulously engineered for a complete top and bottom-end rebuild. This comprehensive kit ensures your engine performs at its peak, featuring a durable crankshaft and rod assembly that meets rigorous...09031491- SKU:
- 09031491
- Availability:
- Ships Same Business Day
- Weight:
- 13.80 LBS
- BORE SIZE METRIC:
- 66.40 MM
- FEATURES:
- PROLITE® PISTON
- OVERBORE METRIC:
- STANDARD
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $664.95Now: $565.00Was: $664.95 -
On Sale
Wiseco Engine Rebuild Kit KTM 65 SX 2003-2008 PWR161A-100
WISECO
MSRP: $479.95Now: $408.00Was: $479.95Revitalize your ride with the WISECO Engine Kit, expertly designed for the 65SX model from 2003 to 2008. This comprehensive kit provides all the essential components needed for a complete engine rebuild, ensuring optimal performance and longevity. ...09031538- SKU:
- 09031538
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- BORE SIZE METRIC:
- 45.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- DISPLACEMENT:
- 65 CC
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- OVERBORE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
MSRP: $479.95Now: $408.00Was: $479.95Qty in Cart: 0Quantity:Price:MSRP: $479.95Now: $408.00Was: $479.95Subtotal: -
On Sale
Wiseco Engine Rebuild Kit for Kawasaki KX85 2006-2013 PWR164-101
WISECO
MSRP: $469.95Now: $399.00Was: $469.95Revitalize your KX85 with the WISECO Engine Rebuild Kit, meticulously crafted for performance and reliability. This comprehensive kit contains everything you need for a complete engine overhaul, ensuring your bike runs smoothly and efficiently for years...09031543- SKU:
- 09031543
- Availability:
- Ships Same Business Day
- Weight:
- 7.65 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- DISPLACEMENT:
- 85 CC
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.50 MM
- OVERBORE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
MSRP: $469.95Now: $399.00Was: $469.95Qty in Cart: 0Quantity:Price:MSRP: $469.95Now: $399.00Was: $469.95Subtotal: -
On Sale
Wiseco Engine Rebuild Kit Honda CRF250R 2014-2015 PWR168-101
WISECO
MSRP: $864.95Now: $735.00Was: $864.95Upgrade your motorcycle's performance with the WISECO Engine Kit, specifically designed for the CRF250 models from 2014 to 2015. This comprehensive kit includes all essential components for a complete engine rebuild, ensuring your bike runs smoothly and...09031547- SKU:
- 09031547
- Availability:
- Ships Same Business Day
- Weight:
- 11.75 LBS
MSRP: $864.95Now: $735.00Was: $864.95Qty in Cart: 0Quantity:Price:MSRP: $864.95Now: $735.00Was: $864.95Subtotal: -
On Sale
Wiseco Engine Rebuild Kit Kawasaki KX85 2014-2020 48.5mm PWR173-101
WISECO
MSRP: $569.95Now: $484.00Was: $569.95Revitalize your engine with the WISECO Engine Rebuild Kit PWR173-101, designed for both 4-stroke and 2-stroke applications. This comprehensive kit includes everything you need for a complete engine overhaul, ensuring optimal performance and longevity...09031682- SKU:
- 09031682
- Availability:
- Ships Same Business Day
- Weight:
- 3.52 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.50 MM
MSRP: $569.95Now: $484.00Was: $569.95Qty in Cart: 0Quantity:Price:MSRP: $569.95Now: $484.00Was: $569.95Subtotal: -
On Sale
Wiseco Ring Set 49.50mm Yamaha YZ80 1976-1980 1949CD
WISECO
MSRP: $49.95Now: $42.00Was: $49.95Enhance your engine's performance with the WISECO Ring Set 1949CD, designed for precision and durability. Each set is tailored for a single piston, ensuring a perfect fit for optimal sealing and efficiency. Upgrade your engine's reliability and power...1949CD- SKU:
- 1949CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- DISPLACEMENT:
- 79,7 CC
- BORE SIZE METRIC:
- 49.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco Piston Kit Standard Yamaha YZ250 1992-1998 736M06800
WISECO
MSRP: $199.95Now: $170.00Was: $199.95Enhance your YZ250's performance with the WISECO Piston Kit, designed for durability and optimal engine efficiency. This high-quality piston kit is engineered to provide superior power and responsiveness, ensuring your ride meets the demands of both...09101233- SKU:
- 09101233
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 246,8 CC
- PRODUCT NAME:
- PISTON
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- RACER'S CHOICE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 68.00 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 68.00 MM
MSRP: $199.95Now: $170.00Was: $199.95Qty in Cart: 0Quantity:Price:MSRP: $199.95Now: $170.00Was: $199.95Subtotal: -
On Sale
Wiseco Piston Kit 45mm Oversize for Kawasaki KX65 2000-2021 752M04500
WISECO
MSRP: $119.95Now: $102.00Was: $119.95The WISECO Piston Kit 752M04500 is engineered for high-performance applications, delivering exceptional power and reliability. Designed for easy installation, this kit enhances engine efficiency and overall performance. Please note that a gasket kit is...09101235- SKU:
- 09101235
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE SIZE METRIC:
- 45.00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 41.60 MM
- DISPLACEMENT:
- 64 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
MSRP: $119.95Now: $102.00Was: $119.95Qty in Cart: 0Quantity:Price:MSRP: $119.95Now: $102.00Was: $119.95Subtotal: -
On Sale
Wiseco Piston Kit with Gaskets for Yamaha YZ250 1995-1998 PK1567
WISECO
MSRP: $264.95Now: $225.00Was: $264.95Experience unparalleled performance with the WISECO Piston Kit, expertly engineered for 2-cycle engines. Crafted from high-silicone forged aluminum, this kit ensures durability and optimal thermal stability, making it perfect for high-performance...09030720- SKU:
- 09030720
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- STROKE LENGTH METRIC:
- 68.00 MM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 68.00 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 67.96 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 246.8 CC
- PRODUCT NAME:
- REBUILD KIT
MSRP: $264.95Now: $225.00Was: $264.95 -
On Sale
Wiseco Piston Kit Standard Bore 96mm 12:1 Compression Honda CRF450R 2002-2008 4820M09600
WISECO
MSRP: $204.95Now: $174.00Was: $204.95Enhance the performance of your CRF450R/X with the WISECO Piston Kit. Engineered for durability and efficiency, this piston kit is designed to deliver optimal power and reliability for your off-road adventures. Please note, the kit does not include a...09100334- SKU:
- 09100334
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- ENGINE TYPE:
- 4-STROKE
- STROKE LENGTH METRIC:
- 62.10 MM
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
MSRP: $204.95Now: $174.00Was: $204.95 -
On Sale
Wiseco Piston Kit 102.40mm 9:1 Compression Honda XR650L 1993-2020 4562M10241
WISECO
MSRP: $269.95Now: $229.00Was: $269.95Enhance your XR650L’s performance with the WISECO Piston Kit, designed for durability and precision. This kit provides a +2.40 mm increase in piston size, ensuring improved power and efficiency without compromising reliability. Please note that this kit...09100338- SKU:
- 09100338
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- DISPLACEMENT:
- 675 CC
- PISTON MATERIAL:
- FORGED
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 82.00 MM
- BORE - OVERSIZE METRIC:
- +2.40 MM
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE - OVERSIZE:
- +2,40 MM
- BORE SIZE METRIC:
- 102.40 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $269.95Now: $229.00Was: $269.95 -
On Sale
Wiseco 66mm 11.7:1 Piston Kit for 2007-2009 Honda CRF150R PK1427
WISECO
MSRP: $299.95Now: $255.00Was: $299.95Enhance your engine's performance with the WISECO Piston Kit, meticulously crafted for 2-cycle engines. Made from high-silicone forged material, this kit ensures exceptional strength and minimizes expansion at elevated temperatures, promoting durability...09030688- SKU:
- 09030688
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- FORGED SERIES
- BORE SIZE METRIC:
- 66.00 MM
- DISPLACEMENT:
- 150 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 43.70 MM
- PISTON DIAMETER METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
MSRP: $299.95Now: $255.00Was: $299.95 -
On Sale
Wiseco Piston Kit with Gaskets for 2005-2007 Honda CR125R PK1393
WISECO
MSRP: $219.95Now: $187.00Was: $219.95The WISECO Piston Kit with Gaskets PK1393 is engineered for optimal performance in 2-cycle engines. Crafted from high-silicone forged aluminum, this kit ensures enhanced strength and reduced thermal expansion, making it ideal for high-performance...09030520- SKU:
- 09030520
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- REBUILD KIT
- PISTON DIAMETER METRIC:
- 53.94 MM
- STROKE LENGTH METRIC:
- 54.50 MM
MSRP: $219.95Now: $187.00Was: $219.95 -
On Sale
Wiseco Piston Kit with Gaskets for KTM 200 EXC 2003-2016 PK1373
WISECO
MSRP: $239.95Now: $204.00Was: $239.95Experience enhanced performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged materials, this kit ensures superior strength and reduced thermal expansion, making it ideal for high-temperature...09030530- SKU:
- 09030530
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- MODEL:
- PRO-LITE
- UNITS:
- KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 60.00 MM
- BORE SIZE METRIC:
- 64.00 MM
- DISPLACEMENT:
- 193 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 63.95 MM
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
MSRP: $239.95Now: $204.00Was: $239.95 -
On Sale
Wiseco Yamaha RT180 1990-1998 65.00mm Piston Kit 772M06500
WISECO
MSRP: $154.95Now: $132.00Was: $154.95Elevate your Yamaha RT180's performance with the WISECO Piston Kit, designed for enhanced power and reliability. This high-quality piston kit ensures optimal engine efficiency, allowing for smoother operation and improved throttle response. Please note...09102876- SKU:
- 09102876
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE - OVERSIZE:
- +0,50 MM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE SIZE METRIC:
- 65.00 MM
- DISPLACEMENT:
- 179 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
MSRP: $154.95Now: $132.00Was: $154.95Qty in Cart: 0Quantity:Price:MSRP: $154.95Now: $132.00Was: $154.95Subtotal: -
On Sale
Wiseco Piston Kit Standard Bore 62.5mm 1999-2009 Gas Gas EC 200 848M06250
WISECO
MSRP: $174.95Now: $149.00Was: $174.95Enhance your engine's performance with the WISECO Piston Kit Standard EC 200 848M06250, designed for durability and precision. This kit is perfect for those looking to replace their piston without the need for a gasket kit, ensuring a straightforward...09102879- SKU:
- 09102879
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- STROKE LENGTH METRIC:
- 65.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 62.50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 199 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
MSRP: $174.95Now: $149.00Was: $174.95Qty in Cart: 0Quantity:Price:MSRP: $174.95Now: $149.00Was: $174.95Subtotal: -
On Sale
Wiseco Piston Kit 2004-2006 Yamaha YFZ450 864M04500
WISECO
MSRP: $119.95Now: $102.00Was: $119.95The WISECO Piston Kit Standard 864M04500 is engineered for optimal performance and durability, making it an essential upgrade for your engine. This kit is designed to enhance power output while maintaining reliability, ensuring a smooth and efficient...09102880- SKU:
- 09102880
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 65 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 40.80 MM
- BORE SIZE METRIC:
- 45.00 MM
MSRP: $119.95Now: $102.00Was: $119.95Qty in Cart: 0Quantity:Price:MSRP: $119.95Now: $102.00Was: $119.95Subtotal:
