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
-
Wossner Piston Kit Kawasaki KX85 2001-2025 48.45mm 8102DA
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8102DA, engineered specifically for 2-stroke engines. This premium kit combines cutting-edge technology with high-quality materials to deliver enhanced durability and efficiency, ensuring...09104826- SKU:
- 09104826
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 48.45 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- TYPE:
- SINGLE RING
- BORE SIZE METRIC:
- 48.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$112.00 -
Wossner Piston Kit Kawasaki KX85 2001-2025 48.47mm 8102DC
WOSSNER
$112.00Elevate your engine's performance with the WOSSNER Piston Kit 8102DC, expertly crafted for 2-stroke applications. This premium piston kit combines advanced engineering with high-quality materials to ensure optimal efficiency and longevity, making it an...09104828- SKU:
- 09104828
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE:
- +0,02 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 48.47 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 48.52 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$112.00 -
Wossner Suzuki RM85 2002-2023 47.97mm Piston Kit 8103DC
WOSSNER
$112.00Experience superior performance with the WOSSNER Piston Kit 8103DC, designed for 2-stroke engines. This high-quality kit includes everything you need for optimal engine function, featuring advanced materials and engineering techniques for enhanced...09104831- SKU:
- 09104831
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +0.02 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,02 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.02 MM
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 47.97 MM
$112.00 -
Wossner 47.45mm Single Ring Piston Kit for Yamaha YZ85 2002-2025 8104DA
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8104DA, expertly crafted for 2-stroke engines. This premium piston kit combines advanced engineering and high-quality materials to enhance your engine's efficiency and longevity, ensuring a...09104832- SKU:
- 09104832
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 47.50 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 47.45 MM
$112.00 -
Wossner Yamaha YZ85 2002-2026 Piston Kit 8104DB
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8104DB, designed specifically for 2-stroke engines. Crafted from high-quality materials, this piston kit ensures reduced friction and enhanced durability, providing a quieter ride and...09104833- SKU:
- 09104833
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 47.51 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,01 MM
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 47.46 MM
$112.00 -
Wossner Piston Kit KTM 85 SX 2003-2025 47.02mm 8147DC
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8147DC, designed specifically for 2-stroke engines. This premium piston kit combines advanced engineering and high-quality materials to enhance your engine's efficiency and longevity. ...09104849- SKU:
- 09104849
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 47.02 MM
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 46.97 MM
- BORE - OVERSIZE:
- +0,02 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$112.00 -
Wossner Dual Ring Piston Kit Honda CR250R 1978-1980 8154DA
WOSSNER
$152.00Elevate your engine's performance with the WOSSNER Piston Kit 8154DA, meticulously crafted for 2-stroke applications. This premium kit combines advanced engineering and high-quality materials to deliver exceptional power, efficiency, and durability,...09104851- SKU:
- 09104851
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 69.94 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 248 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 70.00 MM
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner 53.96mm Single Ring Piston Kit Yamaha YZ125 2005-2021 8160DB
WOSSNER
$122.00Experience superior performance and reliability with the WOSSNER Piston Kit 8160DB, meticulously engineered for 2-stroke engines. This high-quality piston kit is designed to enhance efficiency and reduce friction, ensuring a quieter ride and optimal...09104854- SKU:
- 09104854
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.01 MM
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
$122.00 -
Wossner Piston Kit Kawasaki KX100 1995-2021 52.45mm 8254DA
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8254DA, meticulously engineered for 2-stroke engines. Crafted from premium materials, this piston kit enhances efficiency, reduces friction, and ensures a quieter operation, making it...09104898- SKU:
- 09104898
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 52.45 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 99 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 52.50 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
$112.00 -
Wossner Piston Kit KTM 50 SX 2009-2025 8262DA
WOSSNER
$102.00Experience unparalleled performance with the WOSSNER Piston Kit 8262DA, meticulously engineered for 2-stroke engines. Crafted from high-quality 4032 T6 forged aluminum alloy, this piston kit offers exceptional strength and durability, ensuring optimal...09104899- SKU:
- 09104899
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON SIZE METRIC:
- 39.46 MM
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 49 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 39.50 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$102.00Qty in Cart: 0Quantity:Price:$102.00Subtotal: -
Wössner Piston Kit 39.48mm for KTM 50 SX 2009-2025 8262DC
WOSSNER
$102.00Elevate your engine's performance with the WOSSNER Piston Kit 8262DC, expertly crafted for 2-stroke applications. This premium kit combines innovative engineering with high-quality materials, ensuring optimal efficiency and durability under demanding...09104901- SKU:
- 09104901
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- DISPLACEMENT:
- 49 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,02 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 39.52 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 39.48 MM
- PRODUCT NAME:
- PISTON KIT
$102.00 -
Wossner Piston Kit 94.95mm KTM 520 EXC 2000-2002 8547DA
WOSSNER
$214.00Experience unparalleled performance with the WOSSNER Piston Kit 8547DA, designed specifically for 2-stroke engines. This high-quality piston kit enhances your engine's efficiency and longevity, ensuring a smooth and powerful ride. Engineered in Germany,...09104923- SKU:
- 09104923
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE SIZE METRIC:
- 95.00 MM
- PISTON SIZE METRIC:
- 94.95 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PREMIUM SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$214.00Qty in Cart: 0Quantity:Price:$214.00Subtotal: -
Wossner Piston Kit KTM 525 EXC 2003-2007 8547DB
WOSSNER
$214.00Elevate your engine's performance with the WOSSNER Piston Kit 8547DB, designed for 2-stroke applications. This premium kit features a meticulously engineered piston that enhances efficiency and reduces noise, ensuring a smooth ride. Crafted from...09104924- SKU:
- 09104924
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON SIZE METRIC:
- 94.96 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 95.01 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PREMIUM SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$214.00Qty in Cart: 0Quantity:Price:$214.00Subtotal: -
Wossner Piston Kit Yamaha YZ250F 2001-2004 77mm 12.5:1 Compression 8559DA
WOSSNER
$184.00Elevate your engine's performance with the WOSSNER Piston Kit 8559DA, expertly engineered for 2-stroke applications. This kit combines cutting-edge technology and premium materials to deliver unparalleled durability and efficiency, ensuring your engine...09104925- SKU:
- 09104925
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE SIZE METRIC:
- 77.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- MODEL:
- PREMIUM SERIES
- PISTON SIZE METRIC:
- 76.96 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$184.00 -
Wossner Piston Kit 76.97mm Yamaha YZ250F 2001-2004 WR250F 2001-2013 8559DB
WOSSNER
$184.00Elevate your engine's performance with the WOSSNER Piston Kit 8559DB, meticulously engineered for 2-stroke applications. Crafted from premium materials, this piston kit ensures optimal efficiency, reduced friction, and enhanced durability, making it the...09104926- SKU:
- 09104926
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE - OVERSIZE:
- +0,01 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 77.01 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- MODEL:
- PREMIUM SERIES
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.97 MM
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$184.00 -
Wossner Piston Kit KTM 450 EXC 2003-2009 11.1:1 CR 8581DB
WOSSNER
$204.00Experience unparalleled performance with the WOSSNER Piston Kit 8581DB, engineered for optimal efficiency and durability. This advanced 2-stroke piston kit is designed to enhance your engine's capabilities, ensuring smooth operation and reduced wear...09104933- SKU:
- 09104933
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- +0,01 MM
- COMPRESSION RATIO IMPERIAL:
- 11.1:1
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 88.97 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 89.01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00Qty in Cart: 0Quantity:Price:$204.00Subtotal: -
Wossner Piston Kit 76.97mm Suzuki RM-Z250 2004-2006 8582DB
WOSSNER
$184.00Experience unparalleled performance with the WOSSNER Piston Kit 8582DB, engineered for 2-stroke engines. Crafted from premium 4032 T6 forged aluminum alloy, this piston kit ensures reduced friction and enhanced durability, making it the ideal choice for...09104936- SKU:
- 09104936
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- MODEL:
- STANDARD SERIES
- BORE SIZE METRIC:
- 77.01 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.97 MM
$184.00 -
Wossner Piston Kit 76.80mm 13.9:1 Compression Honda CRF-250R 2010-2013 8775DA
WOSSNER
$204.00Experience unmatched performance and durability with the WOSSNER Piston Kit 8775DA, designed specifically for high-performance two-stroke engines. Crafted from premium 4032 T6 forged aluminum alloy, this piston kit ensures optimal efficiency and reduced...09104980- SKU:
- 09104980
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.76 MM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 76.80 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- UNITS:
- KIT
$204.00 -
Wossner Piston Kit Suzuki RM-Z250 2010-2025 76.96mm 8781DA
WOSSNER
$184.00Enhance your engine's performance with the WOSSNER Piston Kit 8781DA, expertly engineered for 2-stroke applications. This kit combines advanced materials and cutting-edge design to deliver superior durability, reduced friction, and optimal efficiency...09104983- SKU:
- 09104983
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MODEL:
- PRO SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON SIZE METRIC:
- 76.96 MM
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- PRODUCT NAME:
- PISTON KIT
$184.00 -
Wossner 76.97mm Piston Kit for Suzuki RM-Z250 2010-2019 8781DB
WOSSNER
$184.00Elevate your engine's performance with the WOSSNER Piston Kit 8781DB, designed specifically for 2-stroke applications. Engineered for precision and durability, this piston kit ensures optimal power delivery and efficiency, making it an essential upgrade...09104984- SKU:
- 09104984
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.97 MM
- BORE - OVERSIZE:
- +0,01 MM
- BORE SIZE METRIC:
- 77.01 MM
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- PRODUCT NAME:
- PISTON KIT
$184.00
