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!
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- Quantity
- Price
- Subtotal
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Wiseco Wrist Pin for Honda CR125R 1987 Kawasaki KX100 1995-2009 Suzuki RM85 2002-2023 Yamaha YZ85 2002-2018 S288
WISECO
$22.99Unlock the full potential of your engine with the Wiseco High-Tech Piston S288. Designed for enthusiasts who prioritize performance and reliability, this piston combines cutting-edge technology with innovative engineering to deliver exceptional results...S288- SKU:
- S288
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- LENGTH METRIC:
- 54 MM
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER:
- 14,00 MM
- RIDING STYLE:
- OFF-ROAD
- LENGTH:
- 54 MM
- OUTSIDE DIAMETER METRIC:
- 14.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- APPLICATION:
- PISTON
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- STREET
$22.99 -
Wiseco Piston Kit Yamaha XT500 1976-1981 4764M08700
WISECO
$239.95Wiseco 4764M08700 Piston Kit Transform your Yamaha TT500, XT500, or SR500 with the Wiseco 4764M08700 Piston Kit. This high-performance upgrade is engineered for riders who seek exceptional power, reliability, and precision in their motorcycle's...09102923- SKU:
- 09102923
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 87.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- DISPLACEMENT:
- 499 CC
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- STREET
- STROKE LENGTH METRIC:
- 84.00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$239.95 -
Wiseco 88mm 9:1 Piston Kit for Yamaha XT500 1976-1981 4764M08800
WISECO
$239.95Wiseco 4764M08800 Piston Kit Elevate your Yamaha TT500, XT500, or SR500 with the Wiseco 4764M08800 Piston Kit. Designed for enthusiasts who demand excellence, this piston kit combines state-of-the-art engineering with premium materials to enhance your...09102924- SKU:
- 09102924
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE SIZE METRIC:
- 88.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- STREET
- STROKE LENGTH METRIC:
- 84.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 499 CC
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$239.95 -
Wiseco Piston Kit Yamaha SR500 1978-1981 XT500 1976-1981 TT500 1977-1981 4783M09000
WISECO
$269.95Wiseco 4783M09000 Piston Kit Elevate your Yamaha TT500, XT500, or SR500's performance with the Wiseco 4783M09000 Piston Kit. This premium upgrade is meticulously engineered to deliver exceptional power and reliability, making it the ideal choice for...09102927- SKU:
- 09102927
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- STROKE LENGTH METRIC:
- 84.00 MM
- BORE - OVERSIZE METRIC:
- +3.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- BORE - OVERSIZE:
- +3,00 MM
- BORE SIZE METRIC:
- 90.00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- DISPLACEMENT:
- 499 CC
- RIDING STYLE:
- STREET
$269.95 -
Wiseco Piston Kit Honda CRF450R 2017 4978M09600
WISECO
$204.95Wiseco 4978M09600 Piston Kit Elevate your Honda CRF450R's performance with the Wiseco 4978M09600 Piston Kit, meticulously designed for riders seeking unmatched power and reliability. This premium piston kit enhances your engine's capabilities, ensuring...09102933- SKU:
- 09102933
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- DISPLACEMENT:
- 449 CC
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
$204.95 -
Wiseco Piston Kit Kawasaki KX450F 2015 40125M09603
WISECO
$239.95Wiseco 4980M09600 Piston Kit Elevate your Kawasaki KX450F's performance with the Wiseco 4980M09600 Piston Kit. This advanced kit is engineered for riders who demand exceptional power, reliability, and precision in every ride. With premium materials and...09102935- SKU:
- 09102935
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- STROKE LENGTH METRIC:
- 62.10 MM
$239.95 -
Wiseco Piston Kit Honda CRF250R 2004-2007 4984M08200
WISECO
$264.95Wiseco 4984M08200 Piston Kit Transform your Honda CRF into a powerhouse with the Wiseco 4984M08200 Piston Kit. Designed for enthusiasts who seek unparalleled performance, this kit enhances engine efficiency and responsiveness, making every ride an...09102938- SKU:
- 09102938
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE METRIC:
- +4.00 MM
- BORE - OVERSIZE:
- +4,00 MM
- BORE SIZE METRIC:
- 82.00 MM
- DISPLACEMENT:
- 276 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 52.20 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$264.95 -
Wiseco Piston Kit Honda XR650L 1993-2017 10.5:1 101mm Bore 4989M10100
WISECO
$239.95Wiseco 4989M10100 Piston Kit Elevate the performance of your Honda XR650L with the Wiseco 4989M10100 Piston Kit, meticulously engineered for riders who demand excellence. This piston kit enhances your motorcycle's power and efficiency, making it an ideal...09102940- SKU:
- 09102940
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- STROKE LENGTH METRIC:
- 82.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE SIZE METRIC:
- 101.00 MM
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
$239.95 -
Wiseco Yamaha YZ490 1982-1983 Piston Kit 478M08800
WISECO
$234.95Wiseco 478M08800 Piston Kit Transform your Yamaha YZ490 with the Wiseco 478M08800 Piston Kit, engineered for enthusiasts who demand excellence in performance and reliability. This premium piston kit is meticulously crafted to elevate your riding...478M08800- SKU:
- 478M08800
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 487 CC
- PISTON DIAMETER METRIC:
- 87.92 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +1.00 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 88.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH METRIC:
- 82.00 MM
$234.95 -
Wiseco Piston Kit 90mm 12.2:1 Compression for Suzuki DR-Z400 2000-2004 4713M09000
WISECO
$219.95Wiseco 4713M09000 Piston Kit Elevate your ATV or motorcycle's performance with the Wiseco 4713M09000 Piston Kit, meticulously crafted for those who demand both power and reliability. This premium piston kit is designed to enhance your machine's...4713M09000- SKU:
- 4713M09000
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE - OVERSIZE:
- STANDARD
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 398 CC
- PISTON DIAMETER METRIC:
- 89.92 MM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.60 MM
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- ATV
- SKIRT COATING:
- ARMORGLIDE®
- BORE SIZE METRIC:
- 90.00 MM
$219.95 -
Wiseco Piston Kit 90mm 13.5:1 Compression Arctic Cat DVX 400 2004-2008 Kawasaki KFX 400 2003-2006 Suzuki DR-Z 400 2000-2004 4714M09000
WISECO
$219.95Wiseco 4714M09000 Performance Piston Kit Transform your ATV's performance with the Wiseco 4714M09000 Performance Piston Kit. Engineered for enthusiasts, this kit enhances power delivery and reliability, making it the perfect choice for both trail riding...4714M09000- SKU:
- 4714M09000
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE SIZE METRIC:
- 90.00 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 62.60 MM
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 398 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 89.92 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
$219.95 -
Wiseco Piston Yamaha YT175 1982-1983 471M06600
WISECO
$154.95Wiseco 471M06600 Piston Kit Revitalize your Yamaha's engine with the Wiseco 471M06600 Piston Kit. Designed for performance enthusiasts, this piston kit combines cutting-edge engineering with top-tier materials to deliver outstanding power and reliability...471M06600- SKU:
- 471M06600
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 65.95 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 50.00 MM
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 66.00 MM
- DISPLACEMENT:
- 172 CC
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
$154.95 -
Wiseco 66.00mm Piston Kit for Honda CR250R 1981-1983 466M06600
WISECO
$199.95Wiseco 466M06600 Piston Kit Transform your Honda CR250R into a powerhouse with the Wiseco 466M06600 Piston Kit. This high-performance upgrade is meticulously designed for enthusiasts who demand peak performance and reliability, whether on the racetrack...466M06600- SKU:
- 466M06600
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PISTON DIAMETER METRIC:
- 65.95 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 72.00 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 66.00 MM
- DISPLACEMENT:
- 246 CC
- MODEL:
- FORGED SERIES
$199.95 -
Wiseco Piston Kit 39.50mm for KTM 50 SX 2009-2022 874M03950
WISECO
$104.95Wiseco 874M03950 Pro-Lite Piston Kit Unlock the full potential of your Gas Gas, Husqvarna, or KTM bike with the Wiseco 874M03950 Pro-Lite Piston Kit. This premium piston kit is meticulously crafted to enhance your 2-stroke engine's performance, offering...09103963- SKU:
- 09103963
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- DISPLACEMENT:
- 49 CC
- BORE SIZE METRIC:
- 39.50 MM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 40.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
$104.95 -
Wiseco Piston Kit Kawasaki KX85 2014-2024 879M04850
WISECO
$119.95Wiseco 879M04850 2-Stroke Piston Kit Transform your Kawasaki KX85 into a powerhouse with the Wiseco 879M04850 2-Stroke Piston Kit. Designed for performance enthusiasts, this kit offers a perfect blend of strength and efficiency, ensuring your bike...09103964- SKU:
- 09103964
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 48.50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 45.80 MM
$119.95 -
Wiseco Piston Kit Kawasaki KX100 2014-2021 880M05250
WISECO
$124.95Wiseco 880M05250 Pro-Lite Piston Kit Elevate your Kawasaki KX100 or KX112 experience with the Wiseco 880M05250 Pro-Lite Piston Kit. Engineered for exceptional performance, this kit combines cutting-edge technology with durable materials to ensure your...09103965- SKU:
- 09103965
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 52.50 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 99 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 45.80 MM
$124.95 -
Wiseco Piston Kit Kawasaki KX450F 2013-2018 12.5:1 Compression 40082M09600
WISECO
$239.95Wiseco 40082M09600 Piston Kit Elevate your Kawasaki KX450F's capabilities with the Wiseco 40082M09600 Piston Kit. This high-performance upgrade is designed for riders who demand excellence on every ride, ensuring optimal efficiency and durability...09103172- SKU:
- 09103172
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
$239.95 -
Wiseco Piston Kit Racer Elite 96mm 14:1 Compression Honda TRX450R 2006-2009 RE817M09600
WISECO
$379.95Wiseco RE817M09600 Racer Elite 4-Stroke Piston Kit Elevate your riding experience with the Wiseco RE817M09600 Racer Elite 4-Stroke Piston Kit, meticulously designed for the Honda TRX450ER and TRX450R. This high-performance piston kit is engineered for...09105126- SKU:
- 09105126
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- ATV
$379.95 -
Wiseco Piston Kit Yamaha YZ65 2018-2026 43.5mm 885M04350
WISECO
$119.95Wiseco 885M04350 Piston Kit Elevate your Yamaha YZ65's performance with the Wiseco 885M04350 Piston Kit. Engineered for excellence, this kit enhances power delivery and reliability, ensuring your bike performs at its peak on any terrain. Experience the...09105380- SKU:
- 09105380
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 43.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$119.95 -
Wiseco Piston Kit 50mm 2002-2020 Suzuki RM85 RE901M05000
WISECO
$134.95Wiseco RE901M05000 Racer Elite 2-Stroke Piston Kit Unleash the full potential of your Suzuki RM85 or RM85L with the Wiseco RE901M05000 Racer Elite 2-Stroke Piston Kit. Designed for high-performance riders, this kit combines advanced engineering with...09105108- SKU:
- 09105108
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +2,00 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 50.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- UNITS:
- KIT
$134.95
