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 87.95mm KTM 350 SX-F 2011-2020 8807DA
WOSSNER
$214.00Experience the pinnacle of performance with the WOSSNER Piston Kit 8807DA, designed for 2-stroke engines. Crafted from premium materials and engineered with precision, this kit enhances your engine's efficiency and longevity, ensuring a smoother and...09104986- SKU:
- 09104986
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 87.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 88.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
$214.00 -
Wossner Piston Kit 87.96mm for 2011-2023 KTM 350 SX-F 8807DB
WOSSNER
$214.00Elevate your engine's performance with the WOSSNER Piston Kit 8807DB, meticulously engineered for optimal efficiency and power. Crafted from premium 4032 T6 forged aluminum alloy, this piston kit ensures durability and reliability under high-load...09104987- SKU:
- 09104987
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 88.01 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 87.96 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$214.00 -
Wossner Piston Kit 87.97mm for KTM 350 SX-F 2011-2022 8807DC
WOSSNER
$214.00Experience unparalleled performance with the WOSSNER Piston Kit 8807DC, 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...09104988- SKU:
- 09104988
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- +0,02 MM
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 88.02 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 87.97 MM
$214.00 -
Wossner Piston Kit 77.96mm Gas Gas EC 250 F 2021-2023 8865DA
WOSSNER
$184.00Upgrade your engine's performance with the WOSSNER Piston Kit 8865DA, designed for optimal efficiency and durability. Crafted from high-quality materials and engineered for precision, this piston kit ensures a smoother operation and enhanced power...09104993- SKU:
- 09104993
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- MODEL:
- PREMIUM SERIES
- PISTON SIZE METRIC:
- 77.96 MM
- BORE SIZE METRIC:
- 78.00 MM
- PRODUCT NAME:
- PISTON KIT
$184.00 -
Wossner Piston Kit Sherco 300 SEF-R 2014-2018 8906DA
WOSSNER
$214.00Experience the pinnacle of performance with the WOSSNER Piston Kit 8906DA, engineered for 2-stroke engines. This premium piston kit combines advanced materials and innovative design, ensuring enhanced power delivery and reliability for your...09104998- SKU:
- 09104998
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PISTON SIZE METRIC:
- 83.94 MM
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- OEM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 84.00 MM
- PISTON MATERIAL:
- FORGED
$214.00 -
Wossner Piston Kit Honda CRF450R 2017-2025 14.0:1 8937DA
WOSSNER
$214.00Elevate your motorcycle's performance with the WOSSNER Piston Kit, specifically designed for the Honda CRF 450 R. Crafted with precision and engineered for durability, this piston kit enhances engine efficiency while ensuring a smooth and quiet ride. ...09106159- SKU:
- 09106159
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON SIZE METRIC:
- 95.95 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$214.00 -
Wossner Piston Kit Kawasaki KX450F 2015 12.8:1 8920DA
WOSSNER
$204.00Elevate your Kawasaki KX 450 F's performance with the WOSSNER Piston Kit, engineered for enthusiasts who demand the best. This high-performance piston kit features advanced materials and cutting-edge design to ensure optimal engine efficiency and...09106163- SKU:
- 09106163
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 95.98 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 96.03 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00 -
Wossner Piston Kit Kawasaki KX450F 2016-2018 8931DA
WOSSNER
$204.00Enhance your Kawasaki KX 450 F's performance with the WOSSNER Piston Kit, meticulously engineered for optimal efficiency and durability. This kit is designed to provide a seamless fit and superior functionality, ensuring your engine runs smoother and...09106164- SKU:
- 09106164
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 96.03 MM
- MODEL:
- STANDARD SERIES
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON SIZE METRIC:
- 95.98 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00 -
Wossner Piston Kit Kawasaki KX250F 2017-2018 14.0:1 CR 8932DA
WOSSNER
$204.00Elevate your bike's performance with the WOSSNER Piston Kit, specifically designed for the Kawasaki KX 250 F. This premium piston kit combines advanced engineering with high-quality materials, ensuring optimal performance and durability on the track or...09106165- SKU:
- 09106165
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.96 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 77.00 MM
$204.00 -
Wossner Piston Kit Kawasaki KX250F 2017-2018 14.0:1 CR 8932DB
WOSSNER
$204.00Enhance your Kawasaki KX 250 F's performance with the WOSSNER Piston Kit, designed for precision and durability. Crafted from premium materials and engineered for optimal efficiency, this piston kit ensures a smoother ride and improved power delivery,...09106166- SKU:
- 09106166
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE - OVERSIZE:
- +0,01 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- PISTON SIZE METRIC:
- 76.97 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.01 MM
- PRODUCT NAME:
- PISTON KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PREMIUM SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$204.00 -
Wossner Piston Kit KTM 350 EXC-F 2012-2016 8941DA
WOSSNER
$214.00Elevate your bike's performance with the WOSSNER Piston Kit designed specifically for the KTM EXC-F 350. This high-quality piston kit combines innovative engineering with premium materials to ensure optimal performance and longevity, making it an...09106167- SKU:
- 09106167
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 88.00 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 87.95 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
$214.00 -
Wossner Piston Kit Kawasaki KX450 2019-2023 12.6:1 8958DA
WOSSNER
$204.00Elevate your bike's performance with the WOSSNER Piston Kit, specifically designed for the Kawasaki KX 450. Engineered with precision and crafted from high-quality materials, this piston kit ensures optimal performance, durability, and reduced friction,...09106168- SKU:
- 09106168
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 95.96 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00 -
Wossner Piston Kit Kawasaki KX450 2019-2023 12.6:1 CR 8958DB
WOSSNER
$204.00Elevate your bike's performance with the WOSSNER Piston Kit, specifically designed for the Kawasaki KX 450. Engineered for durability and efficiency, this piston kit ensures optimal power delivery and reduced friction for an enhanced riding experience. ...09106169- SKU:
- 09106169
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PISTON SIZE METRIC:
- 95.97 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 96.01 MM
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00 -
Wossner Piston Ring Set Yamaha YZ250F 2019-2024 RIK77.00D
WOSSNER
$48.50Enhance your engine's performance with the WOSSNER Piston Ring Set, specifically designed for Suzuki, Kawasaki, and Yamaha models. This replacement ring set ensures optimal sealing and durability, allowing your engine to operate at peak efficiency...09120755- SKU:
- 09120755
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 77.00 MM
- PRODUCT NAME:
- PISTON RING SET
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$48.50Qty in Cart: 0Quantity:Price:$48.50Subtotal: -
Wossner Piston Ring Set 66mm Honda CRF150R 2007-2020 660XKS-3
WOSSNER
$38.50Enhance your engine's performance with the WOSSNER Piston Ring Set designed specifically for Honda 660XKS-3. This high-quality replacement ring set ensures optimal sealing and efficient combustion, maximizing horsepower and torque. Crafted with...09120672- SKU:
- 09120672
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 66.00 MM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON RING SET
- UNITS:
- EACH
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
$38.50 -
Wossner Piston Ring Set Husqvarna FC250 2014-2015 RIK78.00
WOSSNER
$48.50Enhance your engine's performance with the WOSSNER Piston Ring Set, specifically designed for Wossner pistons in KTM and Husqvarna models. This high-quality replacement ring set ensures optimal sealing and longevity, providing a reliable solution for...09120692- SKU:
- 09120692
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING SET
- UNITS:
- EACH
- BORE SIZE METRIC:
- 78.00 MM
- UNITS:
- SET
$48.50 -
Wossner 12x15x14.5 mm Top End Bearing for KTM 50 SX 2007-2022 N1001
WOSSNER
$18.50The WOSSNER Top End Bearing is engineered for high performance and durability, making it an essential component for your 50SX motorcycle. With precise dimensions of 12 mm x 15 mm x 14.5 mm, this bearing ensures optimal fit and function, enhancing the...09240494- SKU:
- 09240494
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 12 MM
- LENGTH METRIC:
- 14.5 MM
- PRODUCT NAME:
- BEARING
- OUTSIDE DIAMETER METRIC:
- 15 MM
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- EACH
$18.50 -
Wossner Top End Bearing 14x18x16.5mm for 2002-2022 Yamaha YZ85 N1006
WOSSNER
$18.50The WOSSNER Top End Bearing N1006 is engineered for high performance and durability, making it an essential component for your engine's top end assembly. With precise dimensions and superior materials, this bearing ensures smooth operation and longevity,...09240447- SKU:
- 09240447
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BEARING
- LENGTH METRIC:
- 16.5 MM
- OUTSIDE DIAMETER METRIC:
- 18 MM
- TYPE:
- TOP END
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- INSIDE DIAMETER METRIC:
- 14 MM
- RIDING STYLE:
- OFF-ROAD
$18.50 -
Wossner Top End Bearing for Kawasaki KX85 2001-2013 N1007
WOSSNER
$18.50The WOSSNER Top End Bearing is engineered for optimal performance and durability, ensuring a reliable connection in high-stress environments. With precise dimensions of 14 mm x 18 mm x 17.2 mm, it is designed to fit seamlessly in various applications,...09240448- SKU:
- 09240448
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH METRIC:
- 17.2 MM
- OUTSIDE DIAMETER METRIC:
- 18 MM
- TYPE:
- TOP END
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 18 MM
- PRODUCT NAME:
- BEARING
$18.50Qty in Cart: 0Quantity:Price:$18.50Subtotal: -
Wossner Top End Bearing 15x19x19.5 mm for 2007-2014 KTM 125 SX N1010
WOSSNER
$18.50The WOSSNER Top End Bearing is engineered for optimal performance and reliability in high-demand applications. With precise dimensions of 15 mm x 19 mm x 19.5 mm, this bearing ensures a perfect fit and smooth operation. Designed to withstand extreme...09240450- SKU:
- 09240450
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 19 MM
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 15 MM
- LENGTH METRIC:
- 19.5 MM
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
$18.50
