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 Suzuki RM125 1989-1999 8055DA
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8055DA, expertly engineered for 2-stroke engines. This high-quality piston kit is designed to enhance your engine's efficiency while minimizing friction and noise. Crafted from premium...09104763- SKU:
- 09104763
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 123 CC
- PISTON SIZE METRIC:
- 53.95 MM
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit 53.96mm for 1989-1999 Suzuki RM125 8055DB
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8055DB, designed specifically for 2-stroke engines. This premium kit combines advanced engineering and high-quality materials to deliver exceptional durability and efficiency, ensuring your...09104764- SKU:
- 09104764
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.01 MM
- DISPLACEMENT:
- 123 CC
- TYPE:
- SINGLE RING
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Suzuki RM125 1989-1999 53.97mm Piston Kit 8055DC
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8055DC, designed specifically for 2-stroke engines. Crafted from premium materials, this piston kit enhances your engine's efficiency while minimizing friction and noise. Engineered in...09104765- SKU:
- 09104765
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,02 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 53.97 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 54.02 MM
- DISPLACEMENT:
- 123 CC
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit 53.96mm for KTM 125 SX 2001-2006 8056DB
WOSSNER
$117.95Elevate your engine's performance with the WOSSNER Piston Kit 8056DB, designed for high efficiency and durability. Crafted from premium materials and engineered with precision, this piston kit ensures optimal power delivery and reduced friction for a...09104767- SKU:
- 09104767
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- +0,01 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 54.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +0.01 MM
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$117.95Qty in Cart: 0Quantity:Price:$117.95Subtotal: -
Wossner Piston Kit 53.97mm 2001-2006 KTM 125 SX 8056DC
WOSSNER
$122.00Experience exceptional performance with the WOSSNER Piston Kit 8056DC, designed specifically for 2-stroke engines. Crafted from premium materials and engineered in Germany, this piston kit enhances your engine's efficiency while ensuring durability under...09104768- SKU:
- 09104768
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE METRIC:
- +0.02 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,02 MM
- BORE SIZE METRIC:
- 54.02 MM
- TYPE:
- SINGLE RING
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 53.97 MM
- RIDING STYLE:
- OFF-ROAD
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit for 1998-2001 Yamaha YZ125 53.95mm 8091DA
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8091DA, expertly engineered for 2-stroke engines. This premium piston kit combines cutting-edge technology and high-quality materials to enhance your engine's efficiency and longevity,...09104819- SKU:
- 09104819
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.00 MM
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit Yamaha YZ125 1998-2001 53.97mm 8091DC
WOSSNER
$122.00Enhance your engine's performance with the WOSSNER Piston Kit 8091DC, meticulously engineered for optimal efficiency and durability. This high-quality 2-stroke piston kit includes everything you need for a seamless installation, ensuring your engine runs...09104821- SKU:
- 09104821
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 53.97 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 54.02 MM
- BORE - OVERSIZE:
- +0,02 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit Kawasaki KX85 2001-2025 8102DB
WOSSNER
$112.00Elevate your engine's performance with the WOSSNER Piston Kit 8102DB, expertly crafted for 2-stroke applications. This premium kit combines cutting-edge engineering with high-quality materials to ensure optimal efficiency and durability, making it the...09104827- SKU:
- 09104827
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 48.46 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 48.51 MM
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$112.00Qty in Cart: 0Quantity:Price:$112.00Subtotal: -
Wossner Suzuki RM85 2002-2023 Piston Kit 8103DA
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8103DA, meticulously engineered for 2-stroke engines. This high-quality piston kit is designed to enhance your engine's efficiency while ensuring durability and reliability under high-load...09104829- SKU:
- 09104829
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 84 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 48.00 MM
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 47.95 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$112.00Qty in Cart: 0Quantity:Price:$112.00Subtotal: -
Wossner Piston Kit Yamaha YZ125 2005-2021 8160DA
WOSSNER
$122.00Elevate your engine's performance with the WOSSNER Piston Kit 8160DA, designed for 2-stroke engines. This premium kit features a high-quality piston crafted from advanced materials, ensuring reduced friction and enhanced durability. Experience superior...09104853- SKU:
- 09104853
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE SIZE METRIC:
- 54.00 MM
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit 71.96mm 2008-2011 KTM 300 XC-W 8250DC
WOSSNER
$192.00Experience unparalleled performance with the WOSSNER Piston Kit 8250DC, designed specifically for 2-stroke engines. Crafted from high-quality materials and engineered in Germany, this piston kit ensures optimal efficiency and durability, making it the...09104897- SKU:
- 09104897
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 72.02 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- +0,02 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 71.96 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- DISPLACEMENT:
- 293 CC
$192.00Qty in Cart: 0Quantity:Price:$192.00Subtotal: -
Wossner Piston Kit 39.47mm for KTM 50 SX 2009-2025 8262DB
WOSSNER
$102.00Elevate your engine's performance with the WOSSNER Piston Kit 8262DB, expertly engineered for 2-stroke applications. Crafted from premium materials, this piston kit ensures optimal efficiency and durability, delivering a quiet operation and enhanced...09104900- SKU:
- 09104900
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,01 MM
- BORE SIZE METRIC:
- 39.51 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.01 MM
- DISPLACEMENT:
- 49 CC
- PISTON SIZE METRIC:
- 39.47 MM
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$102.00Qty in Cart: 0Quantity:Price:$102.00Subtotal: -
Wossner Piston Kit 76.96mm Kawasaki KX250F 2011-2014 8814DA
WOSSNER
$184.00Experience unparalleled performance with the WOSSNER Piston Kit 8814DA, designed specifically for 2-stroke engines. This premium kit includes everything you need for a seamless upgrade, featuring advanced engineering for optimal efficiency and power...09104989- SKU:
- 09104989
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- MODEL:
- PREMIUM SERIES
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.96 MM
$184.00Qty in Cart: 0Quantity:Price:$184.00Subtotal: -
Wossner Kawasaki KX250F 2011-2014 13.5:1 CR 8814DC
WOSSNER
$184.00Experience unparalleled performance with the WOSSNER Piston Kit 8814DC, expertly engineered for 2-stroke engines. This premium kit combines cutting-edge technology with high-quality materials to enhance your engine's efficiency and longevity. ...09104991- SKU:
- 09104991
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- MODEL:
- PREMIUM SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 77.02 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON SIZE METRIC:
- 76.98 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,02 MM
$184.00Qty in Cart: 0Quantity:Price:$184.00Subtotal: -
Wossner Piston Kit Yamaha YZ450F 2014-2017 8895DB
WOSSNER
$204.00Elevate your motorcycle's performance with the WOSSNER Piston Kit, expertly designed for the Yamaha YZ 450 F. Crafted from high-quality materials, this piston kit ensures optimal efficiency and durability, making it an essential upgrade for serious...09106162- SKU:
- 09106162
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- +0,01 MM
- BORE SIZE METRIC:
- 97.01 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.01 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- PISTON SIZE METRIC:
- 96.97 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00Qty in Cart: 0Quantity:Price:$204.00Subtotal: -
Wossner Piston Kit KTM 450 SX-F 2007-2012 96.96mm 8665DA
WOSSNER
$214.00Elevate your bike's performance with the WOSSNER Piston Kit, specifically designed for the KTM SX-F 450. Crafted with precision and engineered for reliability, this piston kit ensures optimal performance and longevity, making it an essential upgrade for...09106170- SKU:
- 09106170
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 97.00 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 96.96 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$214.00Qty in Cart: 0Quantity:Price:$214.00Subtotal: -
Wossner 55.94mm Dual Ring Piston Kit Honda CR125M 1973-1978 8151DA
WOSSNER
$132.00Experience unparalleled performance with the WOSSNER Piston Kit 8151DA, designed for 2-stroke engines. This premium kit combines advanced engineering and high-quality materials to enhance your engine's efficiency and longevity, ensuring a smoother and...09105554- SKU:
- 09105554
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 56.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON SIZE METRIC:
- 55.94 MM
$132.00Qty in Cart: 0Quantity:Price:$132.00Subtotal: -
Wossner Piston Kit 66.94mm Honda CR250R 1984-1985 8156D100
WOSSNER
$152.00Elevate your engine's performance with the WOSSNER Piston Kit 8156D100, designed for 2-stroke enthusiasts seeking reliability and power. Crafted from high-quality materials and engineered in Germany, this piston kit promises exceptional durability and...09105559- SKU:
- 09105559
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 67.00 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 66.94 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 250 CC
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner 67.19 mm Piston Kit for Honda CR250R 1984-1985 8156D125
WOSSNER
$182.00Elevate your engine's performance with the WOSSNER Piston Kit 8156D125, expertly crafted for 2-stroke applications. This premium kit combines cutting-edge engineering and high-quality materials to ensure optimal efficiency and durability, making it the...09105560- SKU:
- 09105560
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +1.25 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +1,25 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 67.19 MM
- UNITS:
- KIT
- BORE SIZE METRIC:
- 67.25 MM
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 250 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$182.00Qty in Cart: 0Quantity:Price:$182.00Subtotal: -
Wossner Piston Kit Honda CR250R 1984-1985 67.44mm 8156D150
WOSSNER
$182.00Experience unparalleled performance with the WOSSNER Piston Kit 8156D150, meticulously engineered for two-stroke engines. Crafted from high-quality materials, this piston kit ensures reduced friction and enhanced durability, delivering a smooth and...09105561- SKU:
- 09105561
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,50 MM
- PISTON SIZE METRIC:
- 67.44 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- ATV
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
$182.00Qty in Cart: 0Quantity:Price:$182.00Subtotal:
