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
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Wiseco Piston Kit Yamaha PW50 1981-2025 653M04200
WISECO
$109.95Upgrade your Yamaha PW50 with the WISECO Piston Kit, designed for optimal performance and durability. This high-quality piston kit enhances engine efficiency, ensuring a smoother ride and improved power output. Please note that this kit does not include...09102871- SKU:
- 09102871
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 42.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 39.20 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 54 CC
$109.95 -
Wiseco Piston Kit Standard Bore 64.5mm Yamaha RT180 1990-1998 772M06450
WISECO
$154.95Upgrade your engine's performance with the WISECO Piston Kit Standard RT180 772M06450. Designed for durability and precision, this piston kit enhances your engine's efficiency while ensuring a perfect fit. Note that this kit does not include a gasket...09102875- SKU:
- 09102875
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- DISPLACEMENT:
- 176 CC
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 64.50 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$154.95 -
Wiseco Yamaha RT180 1990-1998 Piston Kit 772M06550
WISECO
$154.95Upgrade your Yamaha RT180 with the WISECO Piston Kit, designed for optimal performance and durability. This high-quality piston kit enhances engine efficiency and power, ensuring a smoother ride and improved throttle response. Please note that this kit...09102877- SKU:
- 09102877
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 65.50 MM
- DISPLACEMENT:
- 182 CC
- STROKE LENGTH METRIC:
- 54.00 MM
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$154.95 -
Wiseco Piston Kit 47.00mm Bore KTM 65 SX 2009-2021 864M04700
WISECO
$134.95The WISECO Piston 864M04700 is engineered for superior performance and durability, crafted from a high-silicon alloy that enhances strength and reliability under extreme conditions. This piston is designed to withstand the rigors of high-performance...09102881- SKU:
- 09102881
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 47.00 MM
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 70 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 40.80 MM
- UNITS:
- EACH
$134.95 -
Wiseco Piston Kit 54mm Standard 2014-2020 KTM 125 SX 868M05400
WISECO
$184.95The WISECO Piston Kit Standard 868M05400 is engineered for optimal performance and reliability, making it an essential upgrade for your engine. Designed with precision, this piston kit ensures a perfect fit and enhances the overall efficiency of your...09102882- SKU:
- 09102882
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 54.00 MM
- RIDING STYLE:
- STREET
$184.95 -
Wiseco Piston Kit 92mm 12.5:1 Compression for 1998-2000 Yamaha WR400F 1998-1999 Yamaha YZ400F 4649M09200
WISECO
$239.95Engineered for peak performance, the Wiseco Piston 4649M09200 is crafted from high-silicon alloy, ensuring exceptional strength and reliability for both trail and racing enthusiasts. This piston is designed to meet the demands of high-performance...4649M09200- SKU:
- 4649M09200
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 91.92 MM
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 92 MM
- DISPLACEMENT:
- 399 CC
- STROKE LENGTH METRIC:
- 60.10 MM
$239.95 -
Wiseco Piston Kit 78mm 11:1 Compression Kawasaki KLX300R 1997-2006 4630M07800
WISECO
$194.95Engineered for peak performance, the Wiseco Piston 4630M07800 is crafted from a high-silicon alloy, ensuring exceptional strength and durability. This piston is ideal for both trail riding and competitive racing, offering reliability that meets the...4630M07800- SKU:
- 4630M07800
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 78.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 292 CC
- PISTON DIAMETER METRIC:
- 77.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 61.20 MM
$194.95 -
Wiseco Piston Kit 54mm 11:1 Compression for Yamaha TT-R125 2000-2009 4752M05400
WISECO
$154.95Engineered for performance and durability, the Wiseco Piston 4752M05400 is crafted from a premium high-silicon alloy, ensuring exceptional strength for both trail and racing applications. This piston is designed to enhance your engine's efficiency while...4752M05400- SKU:
- 4752M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 123.7 CC
- PISTON DIAMETER METRIC:
- 53.95 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 54.00 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
$154.95 -
Wiseco Piston Kit 54.5mm 11:1 Compression for Yamaha TT-R125 2000-2009 4752M05450
WISECO
$154.95Engineered for peak performance, the Wiseco Piston 4752M05450 is crafted from a high-silicon alloy, ensuring exceptional strength and reliability in both competitive and recreational settings. This piston is designed to optimize power and efficiency,...4752M05450- SKU:
- 4752M05450
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- STROKE LENGTH METRIC:
- 54.00 MM
- DISPLACEMENT:
- 123.7 CC
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 54.50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 54.45 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$154.95 -
Wiseco TTR125 2000-2021 11:1 Compression Piston Kit 4752M05500
WISECO
$154.95Experience unmatched performance and reliability with the Wiseco Piston 4752M05500, expertly crafted from high-silicon alloy. Designed for both trail and racing applications, this piston ensures optimal strength and durability. Each unit comes complete...4752M05500- SKU:
- 4752M05500
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE SIZE METRIC:
- 55.00 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 123.7 CC
- PISTON DIAMETER METRIC:
- 54.95 MM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH METRIC:
- 54.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$154.95 -
Wiseco YZ490 IT490 1982-1984 Piston Kit 478M08700
WISECO
$234.95Engineered for superior performance, the Wiseco Piston 478M08700 is crafted from a high-silicon alloy that ensures exceptional strength and durability. This piston is designed to meet the demands of both trail and racing applications, providing...478M08700- SKU:
- 478M08700
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE SIZE METRIC:
- 87.00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 487 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 86.92 MM
- STROKE LENGTH METRIC:
- 82.00 MM
$234.95 -
Wiseco Piston Kit 98mm 9:1 Compression Honda XR600R 1985-2000 4577M09800
WISECO
$239.95Engineered for performance and durability, the Wiseco Piston 4577M09800 is crafted from a high-silicon alloy, ensuring exceptional strength for both racing and trail applications. This piston comes complete with rings and circlips, making it a convenient...4577M09800- SKU:
- 4577M09800
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE - OVERSIZE:
- +1,00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON DIAMETER METRIC:
- 97.92 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 591 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STROKE LENGTH METRIC:
- 80.00 MM
- BORE SIZE METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
$239.95 -
Wiseco Piston Kit Yamaha YZ80 1976-1980 457M05000
WISECO
$134.95Engineered for exceptional performance, the Wiseco Piston 457M05000 is crafted from a high-silicon alloy that ensures superior strength and reliability. Designed for both trail and racing enthusiasts, this piston is compatible with a wide range of...457M05000- SKU:
- 457M05000
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 42.00 MM
- BORE SIZE METRIC:
- 50.00 MM
- DISPLACEMENT:
- 79 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON DIAMETER METRIC:
- 49.95 MM
$134.95 -
Wiseco Piston Kit Kawasaki KX85 2014-2020 RE924M05050
WISECO
$149.95Experience unmatched performance and reliability with the WISECO Racer Elite RE924M05050 piston kit. Engineered with cutting-edge technology, this piston is designed to withstand extreme conditions while ensuring optimal engine efficiency. With over 75...09105091- SKU:
- 09105091
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 50.50 MM
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- UNITS:
- KIT
$149.95 -
Wiseco Piston Kit 1995-2021 Kawasaki KX100 RE907M05300
WISECO
$139.95Experience unparalleled performance with the WISECO Racer Elite Piston Kit, engineered for serious racers and enthusiasts. Crafted from advanced 2000 Series alloy, this piston combines exceptional strength with lightweight design, ensuring optimal...09105093- SKU:
- 09105093
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- SKIRT COATING:
- ARMORFIT™
- BORE - OVERSIZE:
- +0,50 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 53.00 MM
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- PISTON MATERIAL:
- FORGED
$139.95 -
Wossner Piston Kit 44.45mm Kawasaki KX65 2000-2025 8196DA
WOSSNER
$102.00Elevate your engine's performance with the WOSSNER Piston Kit 8196DA, designed specifically for 2-stroke applications. Crafted from premium materials and engineered to perfection, this piston kit ensures reduced friction, enhanced durability, and optimal...09104873- SKU:
- 09104873
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 64 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 44.50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 44.45 MM
$102.00 -
Wossner Piston Kit Yamaha YZ250 1999-2025 66.35mm 8216DA
WOSSNER
$152.00Experience exceptional performance and durability with the WOSSNER Piston Kit 8216DA, meticulously crafted for 2-stroke engines. This comprehensive kit includes everything you need for a seamless installation, ensuring optimal engine efficiency and...09104877- SKU:
- 09104877
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 66.35 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$152.00 -
Wossner Piston Kit Yamaha YZ250 1999-2026 66.36mm 8216DB
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8216DB, meticulously engineered for 2-stroke engines. Crafted from premium materials, this piston kit ensures reduced friction and enhanced durability, delivering a quieter ride and improved...09104878- SKU:
- 09104878
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE SIZE METRIC:
- 66.41 MM
- PISTON SIZE METRIC:
- 66.36 MM
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$152.00 -
Wossner Piston Kit 71.94mm KTM 300 EXC 2004-2005 8219DA
WOSSNER
$192.00Experience unparalleled performance with the WOSSNER Piston Kit 8219DA, expertly crafted for 2-stroke engines. This high-quality kit includes everything you need for a seamless installation, ensuring optimal efficiency and durability in your engine...09104880- SKU:
- 09104880
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- RIDING STYLE:
- STREET
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 71.94 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 293 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$192.00 -
Wossner Piston Kit 71.95mm KTM 300 EXC 2004-2005 8219DB
WOSSNER
$192.00Experience unparalleled performance with the WOSSNER Piston Kit 8219DB, designed specifically for 2-stroke engines. Crafted from premium materials, this piston kit ensures reduced friction and enhanced durability, delivering a quieter and more efficient...09104881- SKU:
- 09104881
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 71.95 MM
- BORE SIZE METRIC:
- 72.01 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- DUAL RING
- BORE - OVERSIZE METRIC:
- +0.01 MM
- DISPLACEMENT:
- 293 CC
$192.00
