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 Standard 86mm Kawasaki KX 500 1988-2004 575M08600
WISECO
$234.95Transform your Kawasaki KX500 into a performance beast with the Wiseco Piston Kit. Crafted with cutting-edge technology, this piston ensures optimal engine efficiency and unrivaled durability, making it the perfect choice for both trail enthusiasts and...575M08600- SKU:
- 575M08600
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 86.00 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 86.00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 86,00 MM
- DISPLACEMENT:
- 499 CC
$234.95 -
Wiseco Piston Kit 1988-2004 Kawasaki KX 500 575M08650
WISECO
$234.95Elevate your Kawasaki KX500's performance with the Wiseco Piston Kit, engineered for those who demand excellence on every ride. This kit offers enhanced power and reliability, making it the perfect choice for both trail enthusiasts and competitive racers...575M08650- SKU:
- 575M08650
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE SIZE METRIC:
- 86.50 MM
- DISPLACEMENT:
- 499 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 86,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 86.00 MM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
$234.95 -
Wiseco Piston Kit 1988-2004 Kawasaki KX 500 575M08700
WISECO
$234.95Elevate your Kawasaki KX500 to new heights with the Wiseco Piston Kit, engineered for riders seeking exceptional power and reliability. This piston kit combines advanced engineering with premium materials, ensuring optimal performance in various riding...575M08700- SKU:
- 575M08700
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 499 CC
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 86.00 MM
- UNITS:
- EACH
- STROKE LENGTH:
- 86,00 MM
- BORE SIZE METRIC:
- 87.00 MM
- RIDING STYLE:
- OFF-ROAD
$234.95 -
Wiseco Piston Standard Yamaha YTZ250 Tri-Z 1985 515M06800
WISECO
$204.95Transform your Yamaha IT 250 or YTZ 250 Tri-Z into a powerhouse with the WISECO Piston Kit. Engineered for performance enthusiasts, this kit combines cutting-edge technology with premium materials to ensure your ride is both exhilarating and reliable...515M06800- SKU:
- 515M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- DISPLACEMENT:
- 246,8 CC
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 68.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 68,00 MM
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 68.00 MM
- PISTON MATERIAL:
- FORGED
$204.95 -
Wiseco Piston Kit Yamaha IT 250 1983 515M06900
WISECO
$204.95Elevate your riding experience with the Wiseco Piston Kit, engineered for exceptional performance and reliability. This high-performance piston is crafted from advanced materials, ensuring your engine runs smoother and more powerfully, whether on the...515M06900- SKU:
- 515M06900
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 68.00 MM
- DISPLACEMENT:
- 246,8 CC
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 69.00 MM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH:
- 68,00 MM
- UNITS:
- EACH
$204.95 -
Wiseco Piston Standard Kawasaki KX 80 1984-1985 514M04800
WISECO
$134.95Elevate your riding experience with the Wiseco Piston Kit, specifically designed for Kawasaki KX80 and KDX80 models. This high-performance piston kit is crafted for riders seeking unmatched reliability and power, whether on rugged trails or competitive...514M04800- SKU:
- 514M04800
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE METRIC:
- 48.00 MM
- DISPLACEMENT:
- 82 CC
- STROKE LENGTH:
- 45,80 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 45.80 MM
$134.95Qty in Cart: 0Quantity:Price:$134.95Subtotal: -
Wiseco Piston Kit with Gaskets for Kawasaki KX250 2007-2008 PK1598
WISECO
$294.95Elevate the performance of your Kawasaki KX250F with the Wiseco Piston Kit PK1598. Crafted with precision and designed for high-performance, this piston kit enhances your bike's power and reliability, ensuring you dominate the track or trail...09030932- SKU:
- 09030932
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 76.96 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- DISPLACEMENT:
- 250 CC
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 53.60 MM
$294.95 -
Wiseco Piston Kit 47mm 10.5:1 Compression for Honda CRF70F 2004-2012 PK1729
WISECO
$159.95Elevate your Honda CRF70F's performance with the Wiseco Piston Kit PK1729, meticulously engineered for riders who demand excellence. This kit not only enhances power but also ensures long-lasting durability, enabling you to tackle any terrain with...09030933- SKU:
- 09030933
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 72 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON DIAMETER METRIC:
- 46.97 MM
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 41.40 MM
- BORE SIZE METRIC:
- 47.00 MM
- MODEL:
- FORGED SERIES
$159.95 -
Wiseco Piston Kit for Kawasaki KX450F 2009-2012 13.5:1 Compression PK1840
WISECO
$339.95Unleash the full potential of your Kawasaki KX450F with the Wiseco Piston Kit PK1840. This premium kit is meticulously engineered to enhance performance and reliability, making it an essential upgrade for serious riders looking to dominate on any terrain...09030935- SKU:
- 09030935
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 95.95 MM
- SKIRT COATING:
- ARMORGLIDE®
$339.95 -
Wiseco Piston Kit Yamaha YZ250F 2008-2011 PK1844
WISECO
$309.95Elevate your Yamaha YZ250F's performance with the Wiseco Piston Kit PK1844. Crafted for durability and precision, this kit is the ideal upgrade for both competitive racers and off-road enthusiasts seeking outstanding power and efficiency. Experience...09030937- SKU:
- 09030937
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON DIAMETER METRIC:
- 76.95 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
- DISPLACEMENT:
- 250 CC
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 53.60 MM
- UNITS:
- KIT
$309.95 -
Wiseco Piston Kit with Gaskets for Yamaha YZ250F 2008-2011 PK1845
WISECO
$344.95Transform your Yamaha YZ250F into a high-performance machine with the Wiseco Top End Kit. Designed for serious riders, this kit enhances engine efficiency and power, ensuring you can tackle any track or trail with confidence. Precision Forged Pistons:...09030938- SKU:
- 09030938
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PISTON DIAMETER METRIC:
- 76.95 MM
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- DISPLACEMENT:
- 250 CC
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 53.60 MM
$344.95 -
Wiseco Piston Kit for Kawasaki KX250F 2011-2014 77mm 13.5:1 Compression PK1879
WISECO
$299.95Transform your Kawasaki KX250F into a powerhouse with the Wiseco Top End Kit. This comprehensive kit is engineered for peak performance, ensuring your bike excels both on the track and off-road. With its high-quality components, you can trust in...09030941- SKU:
- 09030941
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- DISPLACEMENT:
- 250 CC
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 53.60 MM
- PISTON DIAMETER METRIC:
- 76.96 MM
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
$299.95 -
Wiseco KX250F 2011-2014 Piston Kit with Gaskets PK1880
WISECO
$339.95Elevate your Kawasaki KX250F's performance with the WISECO Piston Kit PK1880. Designed for serious riders, this piston kit enhances power delivery and engine efficiency, ensuring you dominate every ride with confidence and control. Precision...09030942- SKU:
- 09030942
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 76.96 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- REBUILD KIT
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- DISPLACEMENT:
- 250 CC
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 53.60 MM
$339.95 -
Wiseco Piston Kit 56mm 2mm Oversize Kawasaki KX125 1998 719M05600
WISECO
$179.95Transform your Kawasaki KX125 into a powerhouse with the Wiseco Piston Kit - 719M05600. Designed for performance enthusiasts, this piston kit enhances your bike's power and reliability, ensuring an exhilarating experience whether on the track or the...719M05600- SKU:
- 719M05600
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- DISPLACEMENT:
- 124 CC
- STROKE LENGTH:
- 54,50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 54.50 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 56.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
$179.95 -
Wiseco Piston Kit Sea-Doo 3D 947 DI 2006-2007 716M08850
WISECO
$174.95Wiseco Piston Kit - 716M08850 Unlock the full potential of your Sea-Doo with the Wiseco Piston Kit, meticulously crafted for enthusiasts seeking unrivaled performance and longevity. This innovative kit enhances engine output and efficiency, ensuring you...716M08850- SKU:
- 716M08850
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 88.50 MM
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- DISPLACEMENT:
- 960 CC
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- +0,50 MM
- RIDING STYLE:
- WATERCRAFT
$174.95 -
Wiseco Piston Kit 89mm for Sea-Doo GSX Limited 1998-1999 716M08900
WISECO
$174.95Wiseco Piston Kit - 716M08900 Elevate your Sea-Doo watercraft's performance with the Wiseco Piston Kit. Crafted for enthusiasts who demand excellence, this kit combines cutting-edge technology with premium materials to deliver unmatched power and...716M08900- SKU:
- 716M08900
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE SIZE METRIC:
- 89.00 MM
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 971 CC
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
$174.95 -
Wiseco Piston Kit 56mm Bore Kawasaki KX125 1986 741M05600
WISECO
$179.95Transform your Kawasaki KX125 into a powerhouse with the Wiseco Piston Kit. Engineered for performance enthusiasts, this kit enhances your bike’s capabilities, ensuring every ride is thrilling and responsive. Experience the perfect blend of strength,...741M05600- SKU:
- 741M05600
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- DISPLACEMENT:
- 124 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 54,50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 56.00 MM
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- EACH
$179.95 -
Wiseco Piston Kit 66.40mm Standard Bore Suzuki RM250 1999 743M06640
WISECO
$199.95Transform your Suzuki RM250 into a powerhouse with the Wiseco Piston Kit, engineered for those who demand exceptional performance and reliability. This high-performance piston kit is designed to enhance your bike's capabilities, whether you're tearing up...743M06640- SKU:
- 743M06640
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 72,00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 66.40 MM
- RIDING STYLE:
- OFF-ROAD
$199.95 -
Wiseco Piston Kit 2025 KTM 65 SX 2.00mm Oversize 746M04700
WISECO
$134.95Elevate your KTM 65's performance with the Wiseco Piston Kit, meticulously engineered to provide unmatched power and reliability. Designed for both competitive racing and recreational riding, this piston kit ensures your engine runs at its peak,...746M04700- SKU:
- 746M04700
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- DISPLACEMENT:
- 63,58 CC
- STROKE LENGTH:
- 40,00 MM
- STROKE LENGTH METRIC:
- 40.00 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 47.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$134.95 -
Wiseco Piston Kit 78mm Bore KTM 380 SX 1998-2002 748M07800
WISECO
$244.95Elevate your riding experience with the WISECO Piston Kit, specifically engineered for the KTM 380 SX and EXC models. This high-performance piston kit is crafted to unleash your bike's full potential, ensuring optimal engine performance and reliability...748M07800- SKU:
- 748M07800
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 77,00 MM
- BORE SIZE METRIC:
- 78.00 MM
- DISPLACEMENT:
- 368 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 77.00 MM
- UNITS:
- EACH
$244.95
