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
-
VERTEX Piston Kit VTKTC23564B
VERTEX
$292.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09103785- SKU:
- 09103785
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
$292.95 -
On Sale
VERTEX Piston Kit 23736B
VERTEX
MSRP: $290.95Now: $186.00Was: $290.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09102615- SKU:
- 09102615
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- DISPLACEMENT:
- 250 CC
- PISTON DIAMETER METRIC:
- 76.96 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
MSRP: $290.95Now: $186.00Was: $290.95 -
VERTEX Piston Kit 23342B
VERTEX
$280.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09102626- SKU:
- 09102626
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$280.95 -
VERTEX Piston Kit 23757A
VERTEX
$268.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09103178- SKU:
- 09103178
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$268.95 -
Wiseco Piston Kit Honda CRF150F 2006-2017 58mm 10:1 40132M05800
WISECO
$154.95Upgrade your Honda's performance with the WISECO Piston Kit, designed for durability and efficiency. Engineered for precision, this kit ensures optimal compression and power delivery, enhancing your riding experience. Please note that gasket kits are not...09103947- SKU:
- 09103947
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE SIZE METRIC:
- 58.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 58.00 MM
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
$154.95 -
Wiseco Piston Kit Husqvarna FC450 2014-2022 RE805M09500
WISECO
$379.95Unlock exceptional performance with the WISECO Racer Elite Piston Kit, meticulously engineered for optimal power and efficiency. Featuring cutting-edge technology, this piston kit is designed to enhance your engine's performance, ensuring maximum torque...09105061- SKU:
- 09105061
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 95.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
$379.95 -
Wiseco TTR250 1999-2006 74mm Piston Kit 10.5:1 Compression 4689M07400
WISECO
$194.95Engineered for performance and durability, the Wiseco Piston 4689M07400 is crafted from a high-silicon alloy, ensuring exceptional strength for both trail and racing applications. This piston is designed to enhance engine efficiency while maintaining...4689M07400- SKU:
- 4689M07400
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 74.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 249 CC
- PISTON DIAMETER METRIC:
- 73.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STROKE LENGTH METRIC:
- 59.60 MM
$194.95 -
Wiseco Piston Kit Honda CRF450R 2017-2025 RE813M09600
WISECO
$379.95Experience unparalleled performance with the WISECO Racer Elite Piston Kit, engineered for maximum power and efficiency. This kit features advanced design elements that enhance durability and optimize engine performance, making it the perfect choice for...09105066- SKU:
- 09105066
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
$379.95Qty in Cart: 0Quantity:Price:$379.95Subtotal: -
Wiseco Piston Kit Racer Elite Suzuki RMZ450 2008-2012 RE814M09600
WISECO
$379.95Unlock exceptional performance with the WISECO Piston Kit Racer Elite, engineered for maximum power and efficiency. This high-compression piston kit is meticulously crafted for superior strength and optimal fit, making it an essential upgrade for serious...09105067- SKU:
- 09105067
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 96.00 MM
$379.95 -
Wiseco Piston Yamaha YZF-R1 1998-2025 0.50mm 451M08550
WISECO
$234.95Engineered for peak performance, the WISECO Piston for Yamaha is crafted from a high-silicon alloy, ensuring exceptional strength and reliability in both racing and trail riding conditions. This piston comes complete with rings and circlips, making it a...451M08550- SKU:
- 451M08550
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- DISPLACEMENT:
- 465 CC
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 82.00 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 85.42 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 85.50 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$234.95 -
Wiseco Piston Kit Husqvarna TC65 2017-2022 RE920M04500
WISECO
$139.95Experience unparalleled performance with the WISECO Racer Elite Piston Kit, designed for serious racers and enthusiasts. Crafted from advanced 2000 Series alloy, this piston kit offers exceptional strength and durability, ensuring optimal performance in...09105100- SKU:
- 09105100
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 45.00 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
$139.95 -
Wiseco Piston Kit with Gaskets 55mm 2001 Yamaha YZ125 PK1350
WISECO
$209.95Elevate your engine's performance with the WISECO Piston Kit, expertly crafted from high-silicone forged materials for superior strength and thermal stability. This comprehensive kit includes everything you need for a complete rebuild, ensuring your...09030228- SKU:
- 09030228
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 54.95 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 55.00 MM
- DISPLACEMENT:
- 124 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$209.95 -
Wiseco 48mm Piston Kit for 1985-1988 1990-1991 Honda XR80R PK1277
WISECO
$179.95Elevate your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged aluminum, this kit ensures exceptional strength and minimal thermal expansion, making it perfect for...09030229- SKU:
- 09030229
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 47.97 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- BORE - OVERSIZE:
- +0,50 MM
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 48.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- DISPLACEMENT:
- 79.7 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
$179.95 -
Wiseco Piston Kit 49mm Honda CRF80F 2004-2013 PK1227
WISECO
$179.95Elevate your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle applications. Crafted from high-silicone forged aluminum, this kit ensures superior strength and reduced thermal expansion, making it ideal for...09030232- SKU:
- 09030232
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- +1,50 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- 49.00 MM
- DISPLACEMENT:
- 79.7 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.00 MM
- PISTON DIAMETER METRIC:
- 48.97 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- REBUILD KIT
$179.95 -
Wiseco Honda XR200 1980-1983 Piston Kit with Gaskets 66.50mm PK1118
WISECO
$204.95Experience unmatched performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged materials, this kit ensures superior strength and reduced thermal expansion, making it ideal for high-performance...09030235- SKU:
- 09030235
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE SIZE METRIC:
- 66.50 MM
- PISTON DIAMETER METRIC:
- 66.45 MM
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 192 CC
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 57.80 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
$204.95 -
Wiseco Piston Kit with Gaskets for Kawasaki KX65 2000-2020 PK1177
WISECO
$164.95Experience unparalleled performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged materials, this kit ensures exceptional strength and minimal thermal expansion, making it ideal for...09030304- SKU:
- 09030304
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 44.50 MM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 41.60 MM
- DISPLACEMENT:
- 64 CC
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 44.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$164.95 -
Wiseco Piston Kit with Gaskets for Kawasaki KX85 2001-2013 PK1187
WISECO
$164.95Experience unparalleled performance with the WISECO Piston Kit, meticulously engineered for 2-cycle engines. Crafted from high-silicone forged material, this kit ensures enhanced strength and reduced thermal expansion, making it ideal for...09030306- SKU:
- 09030306
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.80 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 48.50 MM
- DISPLACEMENT:
- 84.9 CC
- PISTON DIAMETER METRIC:
- 48.45 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$164.95 -
Wiseco 66.40mm Top End Kit for 2002-2004 Honda CR250R PK1195
WISECO
$254.95Elevate your engine's performance with the WISECO Piston Kit, meticulously crafted for optimal strength and durability. This complete kit includes everything you need for a high-performance upgrade, ensuring your engine runs smoothly under demanding...09030307- SKU:
- 09030307
- Availability:
- Ships Same Business Day
- Weight:
- 1.39 LBS
- DISPLACEMENT:
- 249 CC
- PRODUCT NAME:
- REBUILD KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 66.40 MM
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 66.36 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$254.95 -
Wiseco YZ250 2002-2025 Piston Kit with Gaskets PK1198
WISECO
$244.95Upgrade your engine's performance with the WISECO Piston Kit, designed for optimal strength and efficiency. Each kit includes everything you need for a complete top-end rebuild, ensuring your engine operates at its best. Crafted from high-silicone forged...09030308- SKU:
- 09030308
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 66.36 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 66.40 MM
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$244.95 -
Wiseco Yamaha YZ125 1998-2000 Piston Kit with Gaskets PK1173
WISECO
$209.95Enhance your engine's performance with the WISECO Piston Kit PK1173, designed specifically for high-efficiency 2-cycle applications. This comprehensive kit provides everything you need for a complete top-end rebuild, ensuring optimal strength and...09030309- SKU:
- 09030309
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- DISPLACEMENT:
- 124 CC
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE SIZE METRIC:
- 54.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$209.95
