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
-
Wiseco Piston Kit Yamaha DT400 1975-1978 85.50mm 232M08550
WISECO
$209.95Engineered for performance and durability, the WISECO Piston is crafted from a high-silicon alloy, ensuring exceptional strength for both trail and racing applications. This piston is designed to enhance your engine's efficiency and longevity, making it...232M08550- SKU:
- 232M08550
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- BORE SIZE METRIC:
- 85.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON DIAMETER METRIC:
- 85.42 MM
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 397 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
$209.95 -
Wiseco Piston Kit Kawasaki KX250 2002-2004 799M06750
WISECO
$184.95Upgrade your KX250 with the WISECO Piston Kit, designed for optimal performance and durability. This high-quality piston kit enhances engine efficiency, ensuring you get the most out of your ride. Please note that this kit does not include a gasket kit,...09101242- SKU:
- 09101242
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- +1,10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +1.10 MM
- DISPLACEMENT:
- 249,3 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$184.95 -
Wiseco Piston Kit 67.5mm Honda CR250R 2002-2004 801M06750
WISECO
$184.95Enhance the performance of your CR250 with the WISECO Piston Kit, designed specifically for models from 2002 to 2004. This high-quality piston kit is engineered for durability and optimal power output, ensuring your bike runs smoothly and efficiently...09101243- SKU:
- 09101243
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +1.10 MM
- PISTON MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH METRIC:
- 72.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +1,10 MM
- BORE SIZE METRIC:
- 67.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$184.95 -
Wiseco Piston Kit Yamaha YZ250 2002-2025 804M06700
WISECO
$184.95Elevate your bike's performance with the WISECO Piston Kit designed specifically for the YZ 250/X models. This high-quality piston kit ensures optimal engine efficiency and reliability, allowing for enhanced power and smoother operation. Please note that...09101244- SKU:
- 09101244
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE SIZE METRIC:
- 67.00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +0.60 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,60 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
$184.95 -
Wiseco Piston Kit Yamaha YZ250 2002-2025 804M06750
WISECO
$184.95Enhance the performance of your YZ 250/X with the WISECO Piston Kit. Designed for durability and efficiency, this piston kit ensures optimal engine performance and longevity. Please note that the kit does not include a gasket set, so be sure to purchase...09101245- SKU:
- 09101245
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- BORE - OVERSIZE:
- +1,10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE METRIC:
- +1.10 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$184.95Qty in Cart: 0Quantity:Price:$184.95Subtotal: -
Wiseco Piston Kit Standard 56mm Bore KTM 150 SX 2009-2015 869M05600
WISECO
$184.95Elevate your bike's performance with the WISECO Piston Kit, designed specifically for the 144/150SX models. This high-quality piston kit ensures optimal engine efficiency and durability, allowing for a smoother ride and enhanced power delivery. Please...09102883- SKU:
- 09102883
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 56.00 MM
- DISPLACEMENT:
- 144 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 58.50 MM
$184.95 -
Wiseco Piston Kit Standard Bore 97mm 12.5:1 Compression Yamaha YZ450F 2010-2013 40001M09700
WISECO
$239.95Upgrade your YZ450F with the WISECO Piston Kit, designed to enhance performance and reliability. This high-quality piston kit ensures optimal engine function, delivering power and efficiency for your off-road adventures. Please note that this kit does...09102884- SKU:
- 09102884
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- STROKE LENGTH METRIC:
- 60.80 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 97.00 MM
- DISPLACEMENT:
- 449 CC
- PISTON MATERIAL:
- FORGED
$239.95 -
Wiseco Piston Kit Standard Bore 97mm 13.5:1 Compression Yamaha YZ450F 2010-2013 40002M09700
WISECO
$269.95Upgrade your YZ450F with the WISECO Piston Kit, designed for optimal performance and durability. This high-quality piston kit enhances engine efficiency, ensuring smoother operation and increased horsepower. Please note that the kit is sold without a...09102885- SKU:
- 09102885
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- STROKE LENGTH METRIC:
- 60.80 MM
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- BORE SIZE METRIC:
- 97.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$269.95 -
Wiseco Piston Kit Honda CRF250R 2010-2013 76.80mm 13.2:1 40003M07680
WISECO
$189.95Enhance the performance of your CRF250R with the WISECO Piston Kit, designed for durability and precision. This high-quality piston kit ensures optimal engine efficiency and power delivery, making it an essential upgrade for serious riders. Please note...09102886- SKU:
- 09102886
- Availability:
- Ships Same Business Day
- Weight:
- 0.54 LBS
- BORE SIZE METRIC:
- 76.80 MM
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 53.80 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$189.95 -
Wiseco Piston Kit Suzuki RM-Z250 2010-2023 40012M07700
WISECO
$264.95Upgrade your motorcycle's performance with the WISECO Piston Kit Standard designed specifically for the RM-Z 250. This high-quality piston kit ensures optimal engine efficiency and durability, making it an essential choice for serious riders. Please note...09102892- SKU:
- 09102892
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- DISPLACEMENT:
- 250 CC
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 77.00 MM
- STROKE LENGTH METRIC:
- 53.60 MM
$264.95 -
Wiseco Piston Kit 88mm 14.5:1 Compression Husqvarna FE350 2020-2021 40015M08800
WISECO
$279.95The WISECO Piston Kit Standard 40015M08800 is engineered for optimal performance and durability in your engine. Designed to enhance efficiency and power, this piston kit is a perfect upgrade for your motorcycle or ATV. Please note that this kit does not...09102894- SKU:
- 09102894
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 57.50 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 88.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- FORGED
$279.95 -
Wiseco Piston Kit 1.50mm Oversize Yamaha IT400 1977-1978 394M08650
WISECO
$224.95Engineered for performance and durability, the Wiseco 394M08650 piston is crafted from high-silicon alloy, ensuring maximum strength for both racing and trail applications. This piston is designed to enhance engine efficiency and longevity, making it an...394M08650- SKU:
- 394M08650
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- DISPLACEMENT:
- 397 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE SIZE METRIC:
- 86.50 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 86.42 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
- BORE - OVERSIZE:
- +1,50 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$224.95 -
Wiseco Piston Kit 96mm 13:1 Compression for Suzuki RM-Z450 2013-2023 40110M09600
WISECO
$269.95The WISECO Piston Kit 40110M09600 is engineered for high performance and durability, making it an ideal choice for enthusiasts looking to enhance their engine's efficiency. This kit does not include a gasket set, allowing for tailored installation based...09103928- SKU:
- 09103928
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- STROKE LENGTH METRIC:
- 62.10 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$269.95 -
Wiseco Honda XR650R 2000-2007 100mm 10:1 Piston Kit 4715M10000
WISECO
$239.95Experience unparalleled performance with the WISECO Piston 4715M10000, expertly crafted from high-silicon alloy to ensure exceptional strength and reliability. Designed for both trail and racing enthusiasts, this piston is a perfect fit for a variety of...4715M10000- SKU:
- 4715M10000
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 100.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 82.60 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 644 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PISTON DIAMETER METRIC:
- 99.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
$239.95 -
Wiseco Piston Kit Kawasaki KX450F 2015 96.03mm 12.8:1 40125M09603
WISECO
$239.95Elevate your Kawasaki's performance with the WISECO Piston Kit, designed for precision and durability. This high-quality piston kit enhances engine efficiency and power while ensuring a perfect fit for your motorcycle. Please note that this kit does not...09103942- SKU:
- 09103942
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 62.30 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 451 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
$239.95 -
Wossner Piston Kit 53.97mm Kawasaki KX125 2003 8073DC
WOSSNER
$117.95Experience unparalleled performance with the WOSSNER Piston Kit 8073DC, designed specifically for 2-stroke engines. Crafted from premium materials, this piston kit enhances engine efficiency while minimizing friction and noise. Engineered in Germany,...09105505- SKU:
- 09105505
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 54.02 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,02 MM
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 53.97 MM
$117.95 -
Wossner Piston Kit Honda CR250R 1986-1996 66.94mm 8021D060
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8021D060, designed specifically for 2-stroke engines. This premium piston kit combines advanced engineering with high-quality materials to enhance your engine's efficiency and reliability,...09104726- SKU:
- 09104726
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.94 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.60 MM
- DISPLACEMENT:
- 249 CC
- TYPE:
- DUAL RING
- BORE SIZE METRIC:
- 67.00 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,60 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$152.00 -
Wossner Piston Kit 66.94mm for Suzuki RM250 1989-1995 RMX250 1989-1998 8022DA
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8022DA, designed specifically for 2-stroke engines. This premium kit combines advanced engineering and high-quality materials to enhance your engine's efficiency and longevity, ensuring a...09104731- SKU:
- 09104731
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 67.00 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.94 MM
- PRODUCT NAME:
- PISTON KIT
$152.00 -
Wossner Piston Kit 53.97mm Suzuki RM125 2000-2003 8061DC
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8061DC, expertly crafted for 2-stroke engines. This premium kit includes everything you need for a high-performance upgrade, featuring advanced design and engineering for optimal efficiency...09104772- SKU:
- 09104772
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- +0,02 MM
- BORE SIZE METRIC:
- 54.02 MM
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- DISPLACEMENT:
- 124 CC
- 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
- PISTON MATERIAL:
- FORGED
$122.00 -
Wossner Honda CR125R 2000-2003 Piston Kit 8067DB
WOSSNER
$142.00Experience unmatched performance with the WOSSNER Piston Kit 8067DB, designed for enthusiasts who demand the best from their 2-stroke engines. Crafted from premium materials and engineered with precision, this piston kit ensures optimal efficiency and...09104779- SKU:
- 09104779
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- +0,01 MM
- DISPLACEMENT:
- 125 CC
- 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
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$142.00
