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 YZ 250 1988-1991 605M06800
WISECO
$199.95Transform your Yamaha's performance with the Wiseco Piston Kit. Engineered for riders who demand excellence, this kit offers superior durability and power, ensuring you maximize your bike's potential on every ride. High-Performance Alloy: Crafted from...605M06800- SKU:
- 605M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH:
- 68,00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 246,8 CC
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 68.00 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 68.00 MM
$199.95 -
Wiseco Piston Kit 68.50mm for 2002-2004 Honda CR250R 801M06850
WISECO
$224.95Transform your Honda CR250R into a powerhouse with the Wiseco Piston Kit. Crafted for riders who demand peak performance, this kit enhances engine efficiency and responsiveness, ensuring every ride is exhilarating. Experience the thrill of improved...09100201- SKU:
- 09100201
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- +2,10 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +2.10 MM
- DISPLACEMENT:
- 265 CC
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 68.50 MM
$224.95 -
Wiseco Piston Kit 39mm 11:1 Compression Honda CRF50F 2004-2013 4798M03900
WISECO
$119.95Unleash the full potential of your Honda with the Wiseco Piston Kit, meticulously engineered for riders who seek top-tier performance and reliability. This premium piston kit is designed to enhance your bike's power delivery, making it an essential...09100202- SKU:
- 09100202
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.1:1
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 39.00 MM
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 49.5 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 41.40 MM
$119.95 -
Wiseco Piston Kit 68.50mm 2.10mm Oversize Yamaha YZ250 1999-2020 804M06850
WISECO
$224.95Transform your Yamaha's performance with the Wiseco Pro-Lite Piston Kit, engineered for those who demand excellence on the track and trails. This kit promises to elevate your riding experience with unmatched power and reliability, making it an essential...09100207- SKU:
- 09100207
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 68.50 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- BORE - OVERSIZE:
- +2,10 MM
- BORE - OVERSIZE METRIC:
- +2.10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 265 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$224.95 -
Wiseco Piston Kit with Gasket for Suzuki RM-Z250 2010-2018 PK1878
WISECO
$324.95Elevate your riding experience with the Wiseco Performance Piston Kit, meticulously crafted for the Suzuki RMZ250. This kit combines cutting-edge engineering with high-quality materials to enhance your bike's power, efficiency, and longevity, making it...09031167- SKU:
- 09031167
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 53.60 MM
- DISPLACEMENT:
- 250 CC
- SKIRT COATING:
- ARMORGLIDE®
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- PISTON DIAMETER METRIC:
- 76.96 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$324.95 -
Wiseco Piston Kit 89mm 12:1 Compression for 2003-2007 KTM 450 EXC-F 4942M08900
WISECO
$284.95Experience unparalleled performance with the Wiseco Piston Kit, expertly crafted for riders who demand both power and reliability. This kit is engineered to enhance your engine's capabilities, ensuring a thrilling ride whether on the trails or the...09101674- SKU:
- 09101674
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- DISPLACEMENT:
- 448 CC
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 89.00 MM
- SKIRT COATING:
- MOLY COATED
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$284.95 -
Wiseco Piston Kit Standard KTM 360 SX 1996-1997 747M07800
WISECO
$244.95Transform your KTM 360 SX with the Wiseco Piston Kit, crafted for unmatched performance and reliability. Designed for serious riders, this kit enhances your bike's capabilities, making it perfect for both competitive racing and rugged trails. Premium...09101694- SKU:
- 09101694
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 78.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GP STYLE
- STROKE LENGTH METRIC:
- 74.00 MM
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 353 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$244.95Qty in Cart: 0Quantity:Price:$244.95Subtotal: -
Wiseco Piston Kit 58mm for Suzuki RM125 2004-2008 836M05800
WISECO
$199.95Transform your Suzuki's performance with the Wiseco Piston Kit, meticulously crafted to deliver unrivaled power and reliability. This premium piston kit is the perfect upgrade for riders seeking enhanced engine efficiency and longevity. Precision CNC...09101696- SKU:
- 09101696
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE SIZE METRIC:
- 58.00 MM
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$199.95 -
Wiseco Piston Kit Gas Gas EC 300 2015-2018 850M07200
WISECO
$244.95Elevate your engine's performance with the Wiseco Piston Kit. Engineered for 2-stroke engines, this kit combines cutting-edge technology with robust materials to ensure exceptional power and reliability, even in the most demanding conditions. Premium...09101699- SKU:
- 09101699
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- DISPLACEMENT:
- 293 CC
- RIDING STYLE:
- STREET
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
$244.95 -
Wiseco Piston Kit Standard 47mm 10.5:1 Honda CRF70F 2004-2012 4880M04700
WISECO
$134.95Unlock the full potential of your Honda with the Wiseco Piston Kit. Designed for performance enthusiasts, this kit enhances your bike's capabilities, making it ideal for both off-road adventures and daily rides. Precision Engineering: Crafted with...09100747- SKU:
- 09100747
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 47.00 MM
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 41.40 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 72 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$134.95 -
WISECO Piston Kit with Gaskets PK1399
WISECO
$324.95Boost your Suzuki RM-Z450’s power and reliability with the Wiseco Piston Kit - PK1399. Engineered for maximum durability and performance, this top-of-the-line kit is built to meet the demands of riders who push their bikes to the limit. Key...09030569- SKU:
- 09030569
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- BORE SIZE METRIC:
- 95.50 MM
- MODEL:
- FORGED SERIES
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
- DISPLACEMENT:
- 450 CC
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.80 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON DIAMETER METRIC:
- 95.44 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
$324.95 -
Wiseco Piston Kit 48mm 10.5:1 Compression for Honda CRF70F 2004-2012 4880M04800
WISECO
$134.95Transform your Honda XR/CRF70 with the Wiseco Piston Kit, designed for riders seeking exceptional performance and reliability. This high-quality piston kit enhances your engine's efficiency and power output, ensuring your bike performs at its best on any...09100749- SKU:
- 09100749
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- DISPLACEMENT:
- 75 CC
- DISPLACEMENT:
- 72 CC
- STROKE LENGTH METRIC:
- 41.40 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 48.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$134.95 -
Wiseco Piston Kit 49.50 mm Bore Honda XR80 1979-1984 4665M04950
WISECO
$169.95Elevate your Honda's performance with the Wiseco Piston Kit, engineered for superior strength and efficiency. This high-performance kit is ideal for both casual riders and competitive racers, ensuring you get the most out of your engine. Premium...09100327- SKU:
- 09100327
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 49.50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +2.00 MM
- DISPLACEMENT:
- 87 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- UNITS:
- EACH
$169.95 -
Wiseco Piston Kit 67.50mm 0.50mm Oversize for Suzuki RM250 1977-1981 405M06750
WISECO
$199.95Elevate your riding experience with the Wiseco Piston Kit, specifically designed for the Suzuki PE250 and RM250. This high-performance upgrade ensures optimal power delivery and enhanced durability, making it the ideal choice for serious riders seeking...405M06750- SKU:
- 405M06750
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 246 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 67.44 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$199.95 -
Wiseco Piston Kit Yamaha YZ250F 2008-2011 4952M07700
WISECO
$279.95Unlock the true potential of your Yamaha YZ250F with the Wiseco Piston Kit, engineered for superior performance and reliability. Designed for high-demand environments, this kit enhances your bike's power while ensuring durability for every ride...09102936- SKU:
- 09102936
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- STROKE LENGTH METRIC:
- 53.60 MM
- BORE - OVERSIZE:
- +6,00 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +6.00 MM
- BORE SIZE METRIC:
- 83.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$279.95 -
Wiseco Piston Kit for Honda XR650L 1993-2021 4989M10000
WISECO
$239.95Elevate your Honda's performance with the Wiseco Piston Kit, crafted for those who demand exceptional power and reliability. This premium kit is designed to enhance your riding experience, whether you're tackling tough trails or enjoying a leisurely ride...09102939- SKU:
- 09102939
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- BORE SIZE METRIC:
- 100.00 MM
- STROKE LENGTH METRIC:
- 82.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
$239.95 -
Wiseco Honda XR650L 1993-2021 Piston Kit 4989M10241
WISECO
$269.95Wiseco Performance Piston Kit - 4989M10241 Elevate your Honda's performance with the Wiseco Performance Piston Kit, designed for riders who demand superior power and reliability. This premium kit enhances your motorcycle's capabilities, ensuring an...09102941- SKU:
- 09102941
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- STROKE LENGTH METRIC:
- 82.00 MM
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE - OVERSIZE:
- +2,40 MM
- BORE - OVERSIZE METRIC:
- +2.40 MM
- BORE SIZE METRIC:
- 102.40 MM
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$269.95 -
Wiseco Piston Kit 2.00mm Oversize 58.00mm Bore Yamaha YZ125 1976-1982 435M05800
WISECO
$179.95Wiseco Piston Kit - 435M05800 Transform your Yamaha YZ125 into a powerhouse with the Wiseco Piston Kit. Engineered for both competitive and casual riders, this kit delivers exceptional performance and reliability, ensuring your bike excels in any...435M05800- SKU:
- 435M05800
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 58.00 MM
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 57.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 50.00 MM
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 123 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$179.95 -
Wossner Piston Kit 47.47mm Yamaha YZ85 2002-2025 8104DC
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8104DC, engineered specifically for 2-stroke engines. Crafted from high-quality materials, this piston kit delivers exceptional durability and efficiency, ensuring your engine operates at...09104834- SKU:
- 09104834
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 47.47 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 47.52 MM
- MODEL:
- STANDARD SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,02 MM
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- FORGED
$112.00 -
Wossner Piston Kit Honda CR85R 2003-2007 8105DA
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8105DA, designed for enthusiasts who demand the best in their 2-stroke engines. Crafted from premium materials and engineered in Germany, this piston kit enhances your engine's efficiency...09104835- SKU:
- 09104835
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 47.50 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 84.7 CC
- PISTON SIZE METRIC:
- 47.45 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$112.00Qty in Cart: 0Quantity:Price:$112.00Subtotal:
