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 Top End Bearing 18 mm x 22 mm x 19.8 mm N1020
WOSSNER
$18.50The WOSSNER Top End Bearing is engineered for optimal performance and durability in high-demand applications. Designed with precision, this bearing ensures smooth operation and longevity, making it an essential component for your machinery. Upgrade your...09240456- SKU:
- 09240456
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH METRIC:
- 19.8 MM
- OUTSIDE DIAMETER METRIC:
- 22 MM
- APPLICATION:
- CONNECTING ROD
- INSIDE DIAMETER METRIC:
- 18 MM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$18.50 -
Wossner Top End Bearing 18x22x21.8mm Honda CR250R N1021
WOSSNER
$18.50The WOSSNER Top End Bearing is engineered for high-performance applications, providing exceptional durability and reliability. Designed to fit a variety of engines, this bearing ensures optimal performance and longevity under demanding conditions...09240457- SKU:
- 09240457
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 18 MM
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- OUTSIDE DIAMETER METRIC:
- 22 MM
- LENGTH METRIC:
- 21.8 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$18.50 -
Wossner Top End Bearing 18x23x21.8mm Suzuki RM250 1977-2008 N1022
WOSSNER
$18.50Experience unparalleled performance with the WOSSNER Top End Bearing, designed for optimal durability and efficiency in high-demand applications. This precision-engineered bearing ensures smooth operation and longevity, making it an essential component...09240458- SKU:
- 09240458
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 18 MM
- TYPE:
- TOP END
- LENGTH METRIC:
- 21.8 MM
- OUTSIDE DIAMETER METRIC:
- 23 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- CONNECTING ROD
- UNITS:
- EACH
$18.50 -
Wossner Top End Bearing for Kawasaki KX65 2000-2022 N1036
WOSSNER
$18.50Experience superior performance and reliability with the WOSSNER Top End Bearing, designed specifically for high-demand applications. This precision-engineered bearing ensures smooth operation and longevity, making it an essential component for any...09240459- SKU:
- 09240459
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 16 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- INSIDE DIAMETER METRIC:
- 12 MM
- LENGTH METRIC:
- 15.8 MM
$18.50 -
Wossner Suzuki RM250 1998 Piston Kit 66.34mm 8140DA
WOSSNER
$152.00Experience unmatched performance and reliability with the WOSSNER Piston Kit 8140DA, expertly engineered for 2-stroke engines. This premium kit includes everything you need for a smooth upgrade, featuring advanced materials and innovative design to...09105552- SKU:
- 09105552
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE SIZE METRIC:
- 66.40 MM
- DISPLACEMENT:
- 246 CC
- PISTON SIZE METRIC:
- 66.34 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Piston Kit 55.44mm Honda CR125R 1980-1984 8149DA
WOSSNER
$132.00Experience unparalleled performance with the WOSSNER Piston Kit 8149DA, engineered specifically for 2-stroke engines. Crafted from premium materials and designed using advanced computer simulations, this piston kit ensures optimal efficiency and...09105553- SKU:
- 09105553
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 55.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- PISTON SIZE METRIC:
- 55.44 MM
- UNITS:
- KIT
$132.00 -
Wossner Piston Kit Honda CR250R 1984-1985 8156DA
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8156DA, designed specifically for 2-stroke engines. Crafted from high-quality materials and engineered in Germany, this piston kit enhances engine efficiency while minimizing friction and...09105555- SKU:
- 09105555
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 66.00 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 65.94 MM
- RIDING STYLE:
- ATV
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$152.00 -
Wossner Honda CR250R 1984-1985 Piston Kit 8156D025
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8156D025, designed specifically for 2-stroke engines. Crafted from premium materials and engineered in Germany, this piston kit ensures optimal efficiency and longevity, making it an...09105556- SKU:
- 09105556
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- BORE - OVERSIZE:
- +0,25 MM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- BORE SIZE METRIC:
- 66.25 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 66.19 MM
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- KIT
$152.00 -
Wossner Piston Kit 66.50 mm for Honda CR250R 1997-2001 8156D050
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8156D050, expertly engineered for 2-stroke engines. This premium kit includes everything you need for a seamless installation, ensuring optimal engine efficiency and longevity. Complete...09105557- SKU:
- 09105557
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 66.50 MM
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.44 MM
- PRODUCT NAME:
- PISTON KIT
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Piston Kit 66.69mm Honda CR250R 1984-1985 8156D075
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8156D075, engineered for 2-stroke engines. This premium kit features a meticulously crafted piston designed to enhance efficiency and reduce friction, ensuring a smoother and quieter ride...09105558- SKU:
- 09105558
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 66.75 MM
- BORE - OVERSIZE:
- +0,75 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 66.69 MM
- BORE - OVERSIZE METRIC:
- +0.75 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Honda CR250R 1997-2001 Piston Kit 8161DB
WOSSNER
$150.96Experience superior performance with the WOSSNER Piston Kit 8161DB, expertly engineered for 2-stroke engines. Crafted from high-quality 4032 T6 forged aluminum alloy, this piston kit is designed to enhance efficiency and reduce friction, ensuring a...09105564- SKU:
- 09105564
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,01 MM
- BORE SIZE METRIC:
- 66.41 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 66.35 MM
$150.96 -
Wossner Piston Kit for Honda CR250R 1997-2001 8161DC
WOSSNER
$150.96Experience unparalleled performance with the WOSSNER Piston Kit 8161DC, designed specifically for 2-stroke engines. Crafted from premium materials and engineered for precision, this piston kit enhances your engine's efficiency and longevity while...09105565- SKU:
- 09105565
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- BORE - OVERSIZE METRIC:
- +0.02 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,02 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 66.36 MM
- TYPE:
- SINGLE RING
- BORE SIZE METRIC:
- 66.42 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
$150.96 -
Wossner Piston Kit Kawasaki KX250 2005-2007 8168DB
WOSSNER
$152.00Elevate your engine's performance with the WOSSNER Piston Kit 8168DB, expertly crafted for 2-stroke applications. This premium piston kit combines advanced engineering with high-quality materials, ensuring optimal efficiency and durability under...09105566- SKU:
- 09105566
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 66.41 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 66.35 MM
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Piston Kit Yamaha IT250 1983 8175D100
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8175D100, meticulously engineered for 2-stroke engines. Crafted from high-quality materials, this piston kit ensures enhanced durability, reduced friction, and optimal engine efficiency,...09105568- SKU:
- 09105568
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 246 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- DUAL RING
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 69.00 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 68.94 MM
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$152.00 -
Wossner Piston Kit 70.44mm Yamaha IT250 1978-1980 YZ250 1976-1979 8179D050
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8179D050, expertly engineered for 2-stroke engines. Crafted from high-quality materials, this piston kit ensures reduced friction and enhanced durability, making it the perfect choice for...09105570- SKU:
- 09105570
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- DISPLACEMENT:
- 246 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 70.50 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- TYPE:
- DUAL RING
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 70.44 MM
- RIDING STYLE:
- OFF-ROAD
$152.00 -
Wossner Piston Kit Yamaha YZ250 1976-1979 72mm 8179D200
WOSSNER
$182.00Experience unparalleled performance with the WOSSNER Piston Kit 8179D200, designed for 2-stroke engines. This premium kit includes everything you need for a seamless installation, ensuring enhanced efficiency and reduced friction for a quieter ride...09105571- SKU:
- 09105571
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- DISPLACEMENT:
- 246 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 71.94 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$182.00 -
Wossner Piston Kit Kawasaki KX80 1988-2000 47.95mm 8197DA
WOSSNER
$112.00Enhance your engine's performance with the WOSSNER Piston Kit 8197DA, expertly crafted for 2-stroke applications. This kit combines precision engineering and high-quality materials to deliver exceptional durability and efficiency, ensuring a quieter ride...09105572- SKU:
- 09105572
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 47.95 MM
- BORE SIZE METRIC:
- 48.00 MM
- DISPLACEMENT:
- 79 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$112.00 -
Wossner Piston Kit 57.95mm for 2016-2022 KTM 150 SX 8299DA
WOSSNER
$142.00Elevate your engine's performance with the WOSSNER Piston Kit 8299DA, meticulously engineered for 2-stroke applications. This high-quality kit combines advanced materials and cutting-edge technology to deliver exceptional durability and efficiency,...09105589- SKU:
- 09105589
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 143 CC
- MODEL:
- STANDARD SERIES
- BORE SIZE METRIC:
- 58.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 57.95 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$142.00 -
Wossner Yamaha YZ65 2018-2025 Piston Kit 8306DA
WOSSNER
$112.00Elevate your engine's performance with the WOSSNER Piston Kit 8306DA, designed specifically for 2-stroke applications. This premium piston kit combines superior engineering with high-quality materials to ensure optimal efficiency and durability...09105590- SKU:
- 09105590
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE SIZE METRIC:
- 43.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 43.45 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 65 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$112.00 -
Wossner Piston Kit 67.34mm Kawasaki KX250 1987-1989 8129DA
WOSSNER
$162.00Experience unparalleled performance with the WOSSNER Piston Kit 8129DA, engineered for 2-stroke engines. This kit combines advanced materials and precision engineering to enhance your engine's efficiency and longevity, ensuring a smoother and quieter...09105544- SKU:
- 09105544
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE SIZE METRIC:
- 67.40 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 67.34 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$162.00
