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 Piston Kit with Gaskets for Honda XR250R 1986-2004 73.50mm 10.5:1 PK1220
WISECO
MSRP: $229.95Now: $195.00Was: $229.95Wiseco PK1220 Piston Kit Elevate your dirt bike's performance with the Wiseco PK1220 Piston Kit, meticulously designed for high-performance 4-stroke engines. This piston kit combines cutting-edge engineering with premium materials to deliver unmatched...09030216- SKU:
- 09030216
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- PISTON DIAMETER METRIC:
- 73.45 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 59.50 MM
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 73.50 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
MSRP: $229.95Now: $195.00Was: $229.95 -
On Sale
Wiseco Piston Kit 54mm Honda XR100R 1985-1991 PK1274
WISECO
MSRP: $184.95Now: $157.00Was: $184.95Wiseco PK1274 Piston Kit Unlock the full potential of your Honda XR100 with the Wiseco PK1274 Piston Kit. Engineered for high-performance 2-stroke engines, this kit is designed for those who demand peak performance in every ride. Experience enhanced...09030242- SKU:
- 09030242
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- DISPLACEMENT:
- 99.2 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE SIZE METRIC:
- 54.00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.4:1
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 45.00 MM
- TYPE:
- TOP END
- PISTON DIAMETER METRIC:
- 53.97 MM
- PISTON SIZE METRIC:
- +2.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
MSRP: $184.95Now: $157.00Was: $184.95Qty in Cart: 0Quantity:Price:MSRP: $184.95Now: $157.00Was: $184.95Subtotal: -
On Sale
Wiseco Suzuki RM85 2002-2023 Piston Kit with Gaskets PK1210
WISECO
MSRP: $214.95Now: $183.00Was: $214.95Wiseco PK1210 Piston Kit Elevate your dirt bike's performance with the Wiseco PK1210 Piston Kit, meticulously crafted for 2-stroke engines. This kit is designed to deliver exceptional power and reliability, making it the ideal choice for both competitive...09030294- SKU:
- 09030294
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 52.00 MM
- MODEL:
- RACER'S CHOICE
- STROKE LENGTH METRIC:
- 46.80 MM
- TYPE:
- TOP END
- DISPLACEMENT:
- 99,4 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +5.00 MM
- COOLING SYSTEM:
- LIQUID COOLED
- BORE - OVERSIZE:
- +5,00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
MSRP: $214.95Now: $183.00Was: $214.95 -
On Sale
Wiseco Piston Kit +1.50 mm Yamaha YZ 250 2002-2024 560M06950
WISECO
MSRP: $224.95Now: $191.00Was: $224.95Wiseco 560M06950 Piston Kit Elevate your Yamaha YZ250's performance with the Wiseco 560M06950 Piston Kit, engineered for 2-stroke engines that demand the best. This kit combines advanced technology and robust materials to deliver exceptional power and...560M06950- SKU:
- 560M06950
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +1.50 MM
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE SIZE METRIC:
- 69.50 MM
- DISPLACEMENT:
- 246,8 CC
- BORE - OVERSIZE:
- +1,50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 68,00 MM
- UNITS:
- EACH
MSRP: $224.95Now: $191.00Was: $224.95Qty in Cart: 0Quantity:Price:MSRP: $224.95Now: $191.00Was: $224.95Subtotal: -
On Sale
Wiseco Piston Standard Honda CR125R 2000 564M05400
WISECO
MSRP: $154.95Now: $132.00Was: $154.95Wiseco 564M05400 Piston Kit Elevate your dirt bike's performance with the Wiseco 564M05400 Piston Kit, crafted for serious riders who demand reliability and power from their 2-stroke engines. This piston kit is engineered with precision to enhance your...564M05400- SKU:
- 564M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE SIZE METRIC:
- 54.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 125 CC
- STROKE LENGTH:
- 54,50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 54.50 MM
MSRP: $154.95Now: $132.00Was: $154.95Qty in Cart: 0Quantity:Price:MSRP: $154.95Now: $132.00Was: $154.95Subtotal: -
On Sale
Wiseco Piston 54mm Oversize for Suzuki RM 125 1985-1986 519M05400
WISECO
MSRP: $154.95Now: $132.00Was: $154.95Wiseco 519M05500 Piston Kit Elevate your dirt bike's performance with the Wiseco 519M05500 Piston Kit. Engineered for high-performance 2-stroke engines, this kit is perfect for riders seeking enhanced power and reliability on both the track and the...519M05500- SKU:
- 519M05500
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 123 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- BORE SIZE METRIC:
- 55.00 MM
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 54,00 MM
- STROKE LENGTH METRIC:
- 54.00 MM
MSRP: $154.95Now: $132.00Was: $154.95Qty in Cart: 0Quantity:Price:MSRP: $154.95Now: $132.00Was: $154.95Subtotal: -
On Sale
Wiseco Piston Kit 51.00 mm Yamaha YZ 80 1976-1980 457M05100
WISECO
MSRP: $144.95Now: $123.00Was: $144.95Wiseco 520M05000 Piston Kit Transform your Yamaha YZ80 into a powerhouse with the Wiseco 520M05000 Piston Kit. Engineered for optimal performance, this kit enhances acceleration and durability, making it the ideal choice for riders who demand excellence...520M05000- SKU:
- 520M05000
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 45,60 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 50.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.60 MM
- DISPLACEMENT:
- 82 CC
- BORE - OVERSIZE METRIC:
- +2.00 MM
- RIDING STYLE:
- OFF-ROAD
MSRP: $144.95Now: $123.00Was: $144.95 -
On Sale
Wiseco Piston Standard KTM 300 EXC 2025 712M07200
WISECO
MSRP: $244.95Now: $208.00Was: $244.95Wiseco 712M07200 Piston Kit Unleash the full potential of your dirt bike with the Wiseco 712M07200 Piston Kit, meticulously engineered for high-performance 2-stroke engines. Crafted from premium materials, this piston kit not only enhances engine output...712M07200- SKU:
- 712M07200
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH:
- 73,00 MM
- STROKE LENGTH METRIC:
- 73.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 72.00 MM
- DISPLACEMENT:
- 297 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
MSRP: $244.95Now: $208.00Was: $244.95 -
On Sale
Wiseco Piston Standard Yamaha YZ125 2005-2021 693M05400
WISECO
MSRP: $154.95Now: $132.00Was: $154.95Wiseco 693M05400 Piston Kit Elevate your Yamaha YZ125's performance with the Wiseco 693M05400 Piston Kit, meticulously engineered to enhance power and efficiency. Designed specifically for 2-stroke engines, this premium kit promises a seamless fit and...693M05400- SKU:
- 693M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 54.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 124 CC
- STROKE LENGTH:
- 54,50 MM
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- 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 with Gasket for KTM 300 EXC 2008-2016 PK1870
WISECO
MSRP: $289.95Now: $246.00Was: $289.95Wiseco PK1870 Top End Kit Unlock the full potential of your dirt bike with the Wiseco PK1870 Top End Kit, meticulously crafted for 2-stroke engines. This high-performance upgrade guarantees enhanced power and reliability, making it the ideal choice for...09031164- SKU:
- 09031164
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- DISPLACEMENT:
- 297 CC
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 73.00 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 71.94 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $289.95Now: $246.00Was: $289.95 -
On Sale
Wiseco Cam Chain 2003-2005 Honda CRF150F CC012
WISECO
MSRP: $64.95Now: $55.00Was: $64.95Engineered for exceptional performance, the WISECO Cam Chain CC012 is crafted from high-quality materials that minimize friction and enhance longevity. Designed with the innovative "M" style, this chain delivers superior strength and reliability,...09250312- SKU:
- 09250312
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- NUMBER OF LINKS:
- 100
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 92RH2005
MSRP: $64.95Now: $55.00Was: $64.95 -
On Sale
WISECO Cam Chain CC013
WISECO
MSRP: $79.95Now: $68.00Was: $79.95Made from premium materials to reduce friction and increase service life, "M" style chain gives you maximum strength and durability, Wiseco's in-house engineering ensures its cam chains exceed OEM specifications and tolerance09250313- SKU:
- 09250313
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- CHAIN
- UNITS:
- EACH
- NUMBER OF LINKS:
- 96
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM
- CHAIN SIZE:
- 92RH2015
MSRP: $79.95Now: $68.00Was: $79.95Qty in Cart: 0Quantity:Price:MSRP: $79.95Now: $68.00Was: $79.95Subtotal: -
On Sale
Wiseco 2-Stroke Piston Ring Set 51.00mm Honda CR80R 1980-1984 2008CD
WISECO
MSRP: $49.95Now: $42.00Was: $49.95Upgrade your engine's performance with the WISECO Ring Set 2008CD, designed specifically for one piston. This high-quality ring set ensures optimal sealing and longevity, enhancing your engine's efficiency and power output. Precision-engineered for...2008CD- SKU:
- 2008CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 51.00 MM
- DISPLACEMENT:
- 79,7 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco Ring Set 49mm Kawasaki KX80 1984-2000 1929CD
WISECO
MSRP: $49.95Now: $42.00Was: $49.95The WISECO Ring Set 1929CD is engineered for optimal performance and precision in high-performance engines. Designed specifically for one piston, this ring set ensures a perfect fit and enhances combustion efficiency. Upgrade your engine's reliability...1929CD- SKU:
- 1929CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- SET
- DISPLACEMENT:
- 82,9 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 49.00 MM
- PRODUCT NAME:
- PISTON RING
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco 88mm Ring Set for Suzuki LT500R 1987-1990 3465TD
WISECO
MSRP: $54.95Now: $47.00Was: $54.95The WISECO Ring Set 3465TD is engineered for high-performance applications, ensuring optimal compression and durability. Each set is designed specifically for a single piston, providing a precise fit that enhances engine efficiency and longevity. ...3465TD- SKU:
- 3465TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 88.00 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
MSRP: $54.95Now: $47.00Was: $54.95Qty in Cart: 0Quantity:Price:MSRP: $54.95Now: $47.00Was: $54.95Subtotal: -
On Sale
Wiseco 87.50mm Ring Set for Suzuki LT500R 1987-1990 Yamaha YZ490 1984-1990 3445TD
WISECO
MSRP: $54.95Now: $47.00Was: $54.95Enhance your engine's performance with the WISECO Ring Set 3445TD, designed for precision fit and optimal sealing. Each set is engineered specifically for one piston, ensuring maximum efficiency and durability. Upgrade your engine's reliability with this...3445TD- SKU:
- 3445TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE SIZE METRIC:
- 87.50 MM
- PRODUCT NAME:
- PISTON RING
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
- RIDING STYLE:
- ATV
MSRP: $54.95Now: $47.00Was: $54.95Qty in Cart: 0Quantity:Price:MSRP: $54.95Now: $47.00Was: $54.95Subtotal: -
On Sale
Wiseco 74mm Piston Ring Set for Honda TRX250X 1987-1988 1991-1992 2913XC
WISECO
MSRP: $49.95Now: $42.00Was: $49.95Upgrade your engine's performance with the WISECO Ring Set 2913XC, designed for optimal sealing and durability. Each set is meticulously crafted for a single piston, ensuring a perfect fit and enhanced efficiency. Experience improved power and...2913XC- SKU:
- 2913XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 246 CC
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- DISPLACEMENT:
- 282 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 74.00 MM
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco Honda CR125R 2005-2007 54mm Piston Kit with Gaskets PK1396
WISECO
MSRP: $244.95Now: $208.00Was: $244.95Wiseco PK1396 GP-Series Piston Kit Elevate your riding experience with the Wiseco PK1396 GP-Series Piston Kit, meticulously engineered for enthusiasts who demand peak performance. This advanced piston kit is tailored for 2-stroke engines, providing the...09030521- SKU:
- 09030521
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 54.00 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- RACER'S CHOICE
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- COOLING SYSTEM:
- AIR COOLED
- DISPLACEMENT:
- 125 CC
- STROKE LENGTH METRIC:
- 54.50 MM
MSRP: $244.95Now: $208.00Was: $244.95Qty in Cart: 0Quantity:Price:MSRP: $244.95Now: $208.00Was: $244.95Subtotal: -
On Sale
Wiseco Piston Kit 68.50mm for Honda CR250R 1997-2001 PK1172
WISECO
MSRP: $284.95Now: $242.00Was: $284.95Wiseco PK1172 Top End Kit Unlock the full potential of your 2-stroke engine with the Wiseco PK1172 Top End Kit, meticulously crafted for riders who demand peak performance and reliability. This kit combines cutting-edge technology with high-quality...09030523- SKU:
- 09030523
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BORE - OVERSIZE METRIC:
- +2.10 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- 68.50 MM
- PISTON DIAMETER METRIC:
- 68.46 MM
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- +2,10 MM
- SKIRT COATING:
- NON-COATED
- DISPLACEMENT:
- 249 CC
MSRP: $284.95Now: $242.00Was: $284.95Qty in Cart: 0Quantity:Price:MSRP: $284.95Now: $242.00Was: $284.95Subtotal: -
On Sale
Wiseco Piston Kit Standard 77mm 14.5:1 Compression Kawasaki KX250F 2017-2019 4920M07700
WISECO
MSRP: $224.95Now: $191.00Was: $224.95Wiseco 4920M07700 Piston Kit Elevate your motorcycle's performance with the Wiseco 4920M07700 Piston Kit, engineered for riders who demand the best. This high-performance kit is meticulously crafted to enhance your engine's power and reliability, making...09100844- SKU:
- 09100844
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE SIZE METRIC:
- 77.00 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 53.60 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $224.95Now: $191.00Was: $224.95Qty in Cart: 0Quantity:Price:MSRP: $224.95Now: $191.00Was: $224.95Subtotal:
