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
-
Wiseco Piston Kit 54mm Bore Kawasaki KX125 1994 640M05400
WISECO
$154.95Transform your riding experience with the Wiseco Piston Kit, designed specifically for the Kawasaki KX125. This kit enhances engine performance, providing the power and reliability you need for both competitive racing and rugged trails. Precision...640M05400- SKU:
- 640M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 54.50 MM
- DISPLACEMENT:
- 124 CC
- STROKE LENGTH:
- 54,50 MM
- BORE SIZE METRIC:
- 54.00 MM
- RIDING STYLE:
- OFF-ROAD
$154.95 -
Wiseco Piston Sea-Doo GTX 1994-1995 663M07800
WISECO
$159.95Wiseco Piston Kit - 663M07800 Elevate your Sea-Doo watercraft's performance with the Wiseco Piston Kit, meticulously engineered for unmatched power and reliability. This premium upgrade enhances engine efficiency, allowing for a thrilling ride every time...663M07800- SKU:
- 663M07800
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- DISPLACEMENT:
- 650 CC
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 78.00 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- WATERCRAFT
$159.95 -
Wiseco Piston 78.50mm Sea-Doo GTX 1994-1995 663M07850
WISECO
$159.95Elevate your engine's performance with the Wiseco Piston Kit, part #663M07850. Designed specifically for 650cc engines, this premium kit combines advanced materials and engineering to enhance power, efficiency, and reliability for any riding adventure...663M07850- SKU:
- 663M07850
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- DISPLACEMENT:
- 658 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- EACH
- BORE SIZE METRIC:
- 78.50 MM
- PRODUCT NAME:
- PISTON
$159.95 -
Wiseco Piston 79.00mm 1993-1996 Sea-Doo Explorer GTX SPX XP 663M07900
WISECO
$159.95Wiseco Piston Kit - 663M07900 Elevate your Sea-Doo experience with the Wiseco Piston Kit, meticulously crafted for those who seek enhanced performance and reliability on the water. This high-quality kit integrates cutting-edge technology and superior...663M07900- SKU:
- 663M07900
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- RIDING STYLE:
- WATERCRAFT
- DISPLACEMENT:
- 666 CC
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 79.00 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +1,00 MM
$159.95 -
Wiseco Yamaha YSR50 1987-1992 Piston Kit 598M04300
WISECO
$114.95Transform your Yamaha YSR50 with the Wiseco Piston Kit, engineered for enthusiasts who demand peak performance and reliability. This kit combines advanced materials with precision engineering to unleash your bike's full potential, ensuring a thrilling...598M04300- SKU:
- 598M04300
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BORE - OVERSIZE METRIC:
- +3.00 MM
- DISPLACEMENT:
- 56,6 CC
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +3,00 MM
- BORE SIZE METRIC:
- 43.00 MM
- PISTON MATERIAL:
- ALUMINUM
$114.95 -
Wiseco Piston Standard Suzuki RM 250 1987-1988 558M06700
WISECO
$199.95Elevate your Suzuki RM250’s performance with the Wiseco Piston Kit, meticulously engineered for riders seeking unparalleled power and reliability. Crafted from high-quality materials and precision machined, this piston kit promises to enhance your bike's...558M06700- SKU:
- 558M06700
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- DISPLACEMENT:
- 246 CC
- STROKE LENGTH:
- 70,00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 67.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 70.00 MM
- UNITS:
- EACH
$199.95 -
Wiseco Piston Kit 48.50 mm Bore Suzuki RM 80 1989-1990 579M04850
WISECO
$134.95Transform your Suzuki RM80 with the high-performance Wiseco Piston Kit, expertly designed to enhance engine efficiency and power. This kit is an essential upgrade for riders seeking unparalleled performance and reliability on any terrain. CNC Precision...579M04850- SKU:
- 579M04850
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 48.50 MM
- DISPLACEMENT:
- 82 CC
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 46,80 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 46.80 MM
- UNITS:
- EACH
$134.95 -
Wiseco 81.00mm Piston Kit for Kawasaki 1100 STX 1997-1999 809M08100
WISECO
$149.95Elevate your Kawasaki's performance with the Wiseco Piston Kit 809M08100. Designed for enthusiasts who demand the best, this high-performance piston kit combines advanced engineering with exceptional durability to maximize your engine's efficiency and...809M08100- SKU:
- 809M08100
- Availability:
- Ships Same Business Day
- Weight:
- 1.04 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 1097 CC
- DISPLACEMENT:
- 760 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- WATERCRAFT
- BORE SIZE METRIC:
- 81.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON
$149.95 -
WISECO Piston - Standard - Kawasaki KX 125 822M05400
WISECO
$144.95Unleash the full potential of your Kawasaki KX125 with the Wiseco Piston Kit. Crafted for high-performance and durability, this piston kit is built to meet the rigorous demands of competitive riders and off-road enthusiasts. Key Features: High-Silicon...822M05400- SKU:
- 822M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 124 CC
- STROKE LENGTH:
- 54,50 MM
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 54.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
$144.95 -
Wiseco Piston Kit 47.5mm for 2003-2007 Honda CR85R 833M04750
WISECO
$104.95Elevate your riding experience with the Wiseco Piston Kit, meticulously engineered for the Honda CR85R. This piston kit combines cutting-edge technology with premium materials to deliver remarkable power, reliability, and performance, ensuring every ride...833M04750- SKU:
- 833M04750
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 47,80 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 84,7 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 47.50 MM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 47.80 MM
$104.95 -
Wiseco Piston Kit with Gasket for KTM 65 SX 2009-2024 PK1882
WISECO
$174.95Elevate your KTM or Husqvarna dirt bike's performance with the Wiseco Top End Piston Kit. Designed for riders who demand the best, this kit combines cutting-edge engineering with high-quality materials to provide unmatched power, reliability, and...09031127- SKU:
- 09031127
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 45.00 MM
- PISTON DIAMETER METRIC:
- 44.95 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 40.80 MM
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 65 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$174.95Qty in Cart: 0Quantity:Price:$174.95Subtotal: -
Wiseco Piston Kit with Gasket KTM 250 SX 2007-2014 PK1884
WISECO
$244.95Elevate your KTM's performance with the Wiseco Piston Kit PK1884. Engineered for riders who demand excellence, this kit enhances power delivery and efficiency, ensuring a thrilling ride every time. Experience the difference in responsiveness and...09031129- SKU:
- 09031129
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
- DISPLACEMENT:
- 249 CC
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GP SERIES
- PISTON DIAMETER METRIC:
- 66.32 MM
- BORE SIZE METRIC:
- 66.40 MM
- TYPE:
- TOP END
- UNITS:
- KIT
$244.95 -
Wiseco Piston Kit for Suzuki RM-Z450 2013-2022 12.5:1 Compression PK1891
WISECO
$314.95Transform your Suzuki RMZ450 with the Wiseco Piston Kit, engineered for peak performance and reliability. This kit enhances engine efficiency, delivering a thrilling riding experience both on the track and off-road. Experience the power of advanced...09031136- SKU:
- 09031136
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- STROKE LENGTH METRIC:
- 62.10 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 95.95 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
$314.95Qty in Cart: 0Quantity:Price:$314.95Subtotal: -
Wiseco Suzuki RM-Z 450 2013-2022 Piston Kit 13:1 Compression PK1893
WISECO
$344.95Elevate your Suzuki RMZ450's performance with the Wiseco Piston Kit. Designed for enthusiasts who seek peak power and reliability, this kit combines advanced engineering with high-quality materials to ensure your bike excels in any riding condition...09031138- SKU:
- 09031138
- Availability:
- Ships Same Business Day
- Weight:
- 1.42 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 95.95 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 62.10 MM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
- SKIRT COATING:
- ARMORGLIDE®
$344.95 -
Wiseco Piston Kit with Gasket for 2013-2018 KTM 450 SX-F PK1898
WISECO
$359.95Unleash the full potential of your motorcycle with the Wiseco Top End Kit, part #PK1898. Engineered for high-performance enthusiasts, this kit combines cutting-edge technology with superior materials to enhance your bike's power and reliability...09031142- SKU:
- 09031142
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 94.95 MM
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORGLIDE®
- BORE SIZE METRIC:
- 95.00 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 63.40 MM
- TYPE:
- TOP END
- UNITS:
- KIT
$359.95 -
Wiseco Yamaha YZ450F 2014-2017 Piston Kit with Gasket PK1900
WISECO
$289.95Elevate your Yamaha's performance with the Wiseco Piston Kit, meticulously crafted for enthusiasts who demand excellence. This kit not only enhances power but also ensures reliability, making it the perfect upgrade for serious riders. Precision Forged...09031144- SKU:
- 09031144
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- BORE SIZE METRIC:
- 97.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 96.95 MM
- DISPLACEMENT:
- 449 CC
- SKIRT COATING:
- ARMORGLIDE®
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 60.80 MM
- UNITS:
- KIT
$289.95 -
Wiseco 43.00mm Piston Ring Set for Kawasaki KDX50 2003-2006 1693CD
WISECO
$49.95The WISECO Ring Set 1693CD is engineered for high-performance engines, ensuring optimal sealing and durability. Each set is designed specifically for one piston, providing a perfect fit and reliable operation. Upgrade your engine's efficiency with these...1693CD- SKU:
- 1693CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- DISPLACEMENT:
- 49 CC
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 60 CC
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 43.00 MM
- UNITS:
- SET
$49.95 -
Wiseco 41mm Piston Ring Set for Kawasaki KDX50 2003-2006 1614CD
WISECO
$49.95The WISECO Ring Set 1614CD is engineered for optimal performance, providing a perfect fit for your piston. Designed with precision, this ring set enhances engine efficiency and longevity, ensuring reliable power delivery in every ride. High-quality...1614CD- SKU:
- 1614CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 49 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 41.00 MM
- UNITS:
- SET
$49.95 -
Wiseco Circlip 12mm for Honda CR80R 1980-1984 CW12
WISECO
$2.99Enhance the reliability of your engine with the WISECO Circlip CW12. Crafted from a high-silicon alloy, these circlips offer exceptional strength and durability, ensuring a secure fit for every piston. Designed for easy installation, they provide peace...CW12- SKU:
- CW12
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- OUTSIDE DIAMETER:
- 12,00 MM
- OUTSIDE DIAMETER METRIC:
- 12.00 MM
$2.99 -
Wiseco Circlip 13mm Honda CRF50F 2004-2025 CW13
WISECO
$2.99Experience unparalleled performance with the WISECO Circlip CW13, designed for high-strength and reliable applications. Crafted from a premium high-silicon alloy, this circlip ensures maximum durability and ease of installation, making it an essential...CW13- SKU:
- CW13
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER:
- 13 MM
- OUTSIDE DIAMETER METRIC:
- 13 MM
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- PAIR
$2.99
