Dirt Bike Piston and Ring Kits
Dirt Bike Piston & Ring Kits for Yamaha YZ85, WR250 & YZ250 at JJ Motorsports
Rebuild your dirt bike's top end for maximum power and reliability with premium piston and ring kits from JJ Motorsports, forged from high-strength aluminum for superior heat resistance, lightweight performance, and precise fit in motocross, enduro, and trail riding. Our selection includes complete kits with pistons, high-performance rings, wrist pins, circlips, top-end bearings, and gaskets designed for enhanced combustion efficiency, reduced blow-by, and longer engine life under high-RPM abuse. Compatible with popular models like Yamaha YZ85 (2002-2018), WR250, and YZ250, these Wiseco-engineered components feature CNC-machined crowns for optimal cam shape, ArmorGlide skirt coatings for low friction, and 4032 alloy construction for durability in dusty, aggressive conditions. Whether you're refreshing a youth 85cc 2-stroke or upgrading a 250cc big bore, these kits ensure crisp throttle response, better sealing, and race-ready power without the need for custom boring—perfect for DIY rebuilds or pro-level maintenance.
Shop trusted brands like Wiseco for race-proven quality. Explore related categories such as dirt bike engine for cylinders and valves or dirt bike air and fuel for carburetors and jets.
Top Dirt Bike Piston & Ring Kits
- Wiseco YZ85 2002-2018 Piston Kit with Gaskets PK1202 – 47.50mm forged aluminum piston kit for Yamaha YZ85 2-stroke; includes rings, wrist pin, circlips, bearing, and gaskets for enhanced combustion and throttle response.
- Wiseco 68.00mm Piston Kit with Gaskets Yamaha WR/YZ 250 PK1563 – Complete big bore kit for Yamaha WR250/YZ250; features forged piston, rings, wrist pin, circlips, and top-end gaskets for superior power and sealing.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
Wossner Yamaha YZ250 1992-1998 Piston Kit 8023DA
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8023DA, expertly engineered for 2-stroke engines. This complete kit includes everything you need for a seamless upgrade: a high-quality piston, precision rings, a durable pin, and secure...09104734- SKU:
- 09104734
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 68.00 MM
- PISTON SIZE METRIC:
- 67.94 MM
- UNITS:
- KIT
$152.00 -
Wossner Yamaha YZ250 1992-1998 Piston Kit 8023DB
WOSSNER
$152.00Experience superior performance with the WOSSNER Piston Kit 8023DB, designed for 2-stroke engines. This high-quality kit includes everything you need for optimal engine efficiency, featuring advanced engineering and materials that ensure durability and...09104735- SKU:
- 09104735
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE METRIC:
- 68.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 67.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$152.00 -
Wossner Piston Kit Yamaha YZ250 1992-1998 8023DC
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8023DC, designed specifically for 2-stroke engines. Crafted from high-quality materials and engineered in Germany, this piston kit delivers exceptional durability and efficiency, ensuring...09104736- SKU:
- 09104736
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- +0,02 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 67.96 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 68.02 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$152.00 -
Wossner Piston Kit for 2006-2014 BMW 3 Series 2.5L 8026DA
WOSSNER
$152.00Elevate your engine's performance with the WOSSNER Piston Kit 8026DA, designed for high efficiency and durability. Crafted from premium 4032 T6 forged aluminum alloy, this piston kit ensures reduced friction and noise, enhancing your riding experience...09104740- SKU:
- 09104740
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.34 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Piston Kit Kawasaki KX250 1992-2001 8026DC
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8026DC, designed to enhance your engine's efficiency and power. Crafted from high-quality materials, this piston kit ensures reduced friction and noise, providing a smoother ride. Engineered...09104742- SKU:
- 09104742
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 66.36 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,02 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
- MODEL:
- STANDARD SERIES
- BORE SIZE METRIC:
- 66.42 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Dual Ring Piston Kit KTM 200EXC 1998-2016 200SX 2003-2004 8048DA
WOSSNER
$142.00Experience unparalleled performance with the WOSSNER Piston Kit 8048DA, meticulously engineered for 2-stroke engines. Crafted from high-quality 4032 T6 forged aluminum alloy, this piston kit is designed to enhance efficiency while minimizing friction and...09104755- SKU:
- 09104755
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 63.94 MM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 64.00 MM
- DISPLACEMENT:
- 193 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
$142.00 -
Wossner Piston Kit for KTM 200 EXC 1998-2016 8048DB
WOSSNER
$142.00Experience unmatched performance with the WOSSNER Piston Kit 8048DB, designed specifically for 2-stroke engines. Crafted with precision and innovation, this piston kit enhances your engine's efficiency while ensuring durability and longevity. Elevate...09104756- SKU:
- 09104756
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 64.01 MM
- DISPLACEMENT:
- 193 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PISTON SIZE METRIC:
- 63.95 MM
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- +0,01 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$142.00Qty in Cart: 0Quantity:Price:$142.00Subtotal: -
Wossner Piston Kit KTM 125 SX 2001-2006 8056DA
WOSSNER
$122.00Experience unmatched performance and reliability with the WOSSNER Piston Kit 8056DA, designed specifically for 2-stroke engines. Crafted from high-quality materials and engineered in Germany, this piston kit ensures optimal functionality and longevity,...09104766- SKU:
- 09104766
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 54.00 MM
- PISTON SIZE METRIC:
- 53.95 MM
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$122.00 -
Wossner Suzuki RM250 2000-2002 66.34mm Piston Kit 8059DA
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8059DA, designed specifically for 2-stroke engines. This premium kit ensures optimal efficiency and longevity, thanks to its advanced engineering and high-quality materials. Elevate your...09104769- SKU:
- 09104769
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.34 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 66.40 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Piston Kit 53.96mm Yamaha YZ125 1998-2001 8091DB
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8091DB, designed specifically for 2-stroke engines. This premium kit combines advanced engineering with high-quality materials to deliver exceptional durability and efficiency, ensuring your...09104820- SKU:
- 09104820
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.01 MM
- 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 65.94mm Kawasaki KDX200 1986-2006 8093DA
WOSSNER
$142.00Experience unparalleled performance with the WOSSNER Piston Kit 8093DA, meticulously engineered for 2-stroke engines. This premium piston kit combines advanced materials and innovative design to enhance efficiency, reduce friction, and ensure a quieter...09104822- SKU:
- 09104822
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 65.94 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 198 CC
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
$142.00 -
Wossner Piston Kit Suzuki RM125 2004-2007 8098DA
WOSSNER
$142.00Elevate your engine's performance with the WOSSNER Piston Kit 8098DA, meticulously engineered for 2-stroke applications. Crafted from premium 4032 T6 forged aluminum alloy, this piston kit promises enhanced durability and efficiency, ensuring a smoother...09104823- SKU:
- 09104823
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE SIZE METRIC:
- 54.00 MM
- TYPE:
- SINGLE RING
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$142.00 -
Wossner Suzuki RM125 2004-2007 53.96mm Piston Kit 8098DB
WOSSNER
$142.00Experience unparalleled performance with the WOSSNER Piston Kit 8098DB, designed specifically for 2-stroke engines. Crafted from premium materials and engineered with precision, this piston kit delivers exceptional durability and efficiency, ensuring...09104824- SKU:
- 09104824
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 54.01 MM
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$142.00 -
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
$112.00Qty in Cart: 0Quantity:Price:$112.00Subtotal: -
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:
