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!
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- Price
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On Sale
PROX Piston Kit - 99.95 mm - Beta 498RR/520RR 01.7512.A
PROX
MSRP: $214.95Now: $183.00Was: $214.95Piston Kit - 99.95 mm - Beta 498RR/520RR Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by OEM factories to exact specifications09106813- SKU:
- 09106813
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
MSRP: $214.95Now: $183.00Was: $214.95 -
On Sale
VERTEX Top End Piston Kit - 71.925 mm - Gas Gas | Husqvarna | KTM VTK24244A-1
VERTEX
MSRP: $336.95Now: $303.26Was: $336.95Top End Piston Kit - 71.925 mm - Gas Gas | Husqvarna | KTM The piston is heat treated with a T-5 hardening and tempering cycle, The piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life,...09106818- SKU:
- 09106818
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
MSRP: $336.95Now: $303.26Was: $336.95Qty in Cart: 0Quantity:Price:MSRP: $336.95Now: $303.26Was: $336.95Subtotal: -
On Sale
VERTEX Top End Piston Kit - 71.935 mm - Gas Gas | Husqvarna | KTM VTK24244B-1
VERTEX
MSRP: $336.95Now: $303.26Was: $336.95Top End Piston Kit - 71.935 mm - Gas Gas | Husqvarna | KTM The piston is heat treated with a T-5 hardening and tempering cycle, The piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life,...09106819- SKU:
- 09106819
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
MSRP: $336.95Now: $303.26Was: $336.95Qty in Cart: 0Quantity:Price:MSRP: $336.95Now: $303.26Was: $336.95Subtotal: -
On Sale
VERTEX Top End Piston Kit - 71.945 mm - Gas Gas | Husqvarna | KTM VTK24244C-1
VERTEX
MSRP: $336.95Now: $303.26Was: $336.95Top End Piston Kit - 71.945 mm - Gas Gas | Husqvarna | KTM The piston is heat treated with a T-5 hardening and tempering cycle, The piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life,...09106820- SKU:
- 09106820
- Availability:
- Ships Same Business Day
- Weight:
- 1.34 LBS
MSRP: $336.95Now: $303.26Was: $336.95Qty in Cart: 0Quantity:Price:MSRP: $336.95Now: $303.26Was: $336.95Subtotal: -
On Sale
VERTEX Top End Piston Kit - 66.34 mm - Gas Gas | Husqvarna | KTM VTK23630A-3
VERTEX
MSRP: $307.95Now: $277.16Was: $307.95Top End Piston Kit - 66.34 mm - Gas Gas | Husqvarna | KTM The piston is heat treated with a T-5 hardening and tempering cycle, The piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life,...09106821- SKU:
- 09106821
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
MSRP: $307.95Now: $277.16Was: $307.95Qty in Cart: 0Quantity:Price:MSRP: $307.95Now: $277.16Was: $307.95Subtotal: -
JE PISTONS Piston Kit - 95.00 mm - Gas Gas | Husqvarna | KTM 393215
JE PISTONS
$329.99Piston Kit - 95.00 mm - Gas Gas | Husqvarna | KTM Machined from 2618-T6 high tensile forged aluminum, Made in the USA09106852- SKU:
- 09106852
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$329.99 -
JE PISTONS Pisotn Kit - 95.00 mm - Gas Gas | Husqvarna | KTM 393216
JE PISTONS
$329.99Pisotn Kit - 95.00 mm - Gas Gas | Husqvarna | KTM Machined from 2618-T6 high tensile forged aluminum, Made in the USA09106853- SKU:
- 09106853
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$329.99Qty in Cart: 0Quantity:Price:$329.99Subtotal: -
JE PISTONS Piston Kit - 95.00 mm - Kawasaki 395091
JE PISTONS
$424.99Piston Kit - 95.00 mm - 395091 Precision machined from 2618-T6 high tensile forged aluminum Engineered for optimal performance in Kawasaki engines Lightweight design enhances engine efficiency Durable construction for long-lasting...09106850- SKU:
- 09106850
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$424.99 -
JE PISTONS Piston Kit - 95.00 mm - Kawasaki 395092
JE PISTONS
$424.99Piston Kit - 95.00 mm - 395092 Precision-engineered for optimal performance in Kawasaki engines Crafted from 2618-T6 high tensile forged aluminum for exceptional strength Made in the USA, ensuring high-quality manufacturing standards ...09106851- SKU:
- 09106851
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$424.99Qty in Cart: 0Quantity:Price:$424.99Subtotal: -
JE PISTONS Piston Kit - 97.00 mm - Yamaha 393217
JE PISTONS
$424.99Piston Kit - 97.00 mm - Yamaha Machined from 2618-T6 high tensile forged aluminum, Made in the USA09106854- SKU:
- 09106854
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
$424.99Qty in Cart: 0Quantity:Price:$424.99Subtotal: -
Wossner Piston Kit 94.95 mm for 2024-2025 Gas Gas EC 450F 2023-2025 KTM 450 XCF-W 4070DA
WOSSNER
$214.00Enhance your ride with our premium Piston Kit designed specifically for Gas Gas and KTM models. Crafted with precision, this piston kit combines advanced technology and high-quality materials to deliver exceptional performance, reduced friction, and...09106834- SKU:
- 09106834
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$214.00 -
Wossner Piston Kit 80.95mm KTM SX-F250 2023-2024 4077DA
WOSSNER
$204.00Enhance your motorcycle's performance with our premium 80.95 mm Piston Kit, designed for Gas Gas, Husqvarna, and KTM models. Crafted from aerospace-grade aluminum alloy, this piston kit ensures durability while optimizing power and efficiency. Experience...09106835- SKU:
- 09106835
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$204.00 -
Wossner Piston Kit 80.95 mm KTM 250 SX-F 2023-2025 4090DA
WOSSNER
$244.00Piston Kit - 80.95 mm - Gas Gas | Husqvarna | KTM - 4090DA Elevate your engine's capabilities with our premium Piston Kit, meticulously crafted for enhanced performance and reliability. This kit is tailored for Gas Gas, Husqvarna, and KTM models,...09106836- SKU:
- 09106836
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$244.00 -
Wossner Piston Kit 96.96mm Yamaha YZ450F 2023-2025 4085DA
WOSSNER
$224.00Piston Kit - 96.96 mm - 4085DA Elevate your Yamaha's performance with our premium piston kit, engineered for exceptional efficiency and durability. This advanced kit not only enhances power output but also ensures a smoother and quieter ride, making it a...09106838- SKU:
- 09106838
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$224.00 -
Wossner Piston Kit 96.96mm Yamaha YZ450F 2023-2026 4086DA
WOSSNER
$244.00Piston Kit - 96.96 mm - 4086DA Elevate your Yamaha engine's performance with our top-tier Piston Kit, meticulously crafted for enthusiasts who prioritize quality and efficiency. This kit combines cutting-edge materials and precision engineering, ensuring...09106839- SKU:
- 09106839
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$244.00 -
Wossner 95.95mm Piston Kit for Kawasaki KX450F 2016-2018 4087DA
WOSSNER
$224.00Upgrade your Kawasaki's performance with our precision-engineered 95.95 mm Piston Kit. Crafted from aerospace-grade aluminum alloy, this piston kit offers exceptional durability and efficiency. Experience reduced friction and noise levels while enhancing...09106840- SKU:
- 09106840
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$224.00 -
Wossner Piston Kit 96.96 mm Yamaha YZ450F 2023-2025 4092DA
WOSSNER
$224.00Upgrade your engine's performance with our high-quality 96.96 mm Yamaha Piston Kit. Engineered for precision, this kit enhances efficiency while minimizing friction and noise, ensuring a smoother ride. Crafted from aerospace-grade aluminum, it combines...09106841- SKU:
- 09106841
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$224.00 -
Wossner Piston Kit 96.96 mm Yamaha YZ450F 2023-2025 4093DA
WOSSNER
$244.00Piston Kit - 96.96 mm - 4093DA Enhance your Yamaha's performance with our premium piston kit, meticulously engineered for superior efficiency and durability. This kit promises a smoother ride, reduced noise, and exceptional reliability, making it ideal...09106842- SKU:
- 09106842
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$244.00 -
Wossner Piston Kit 87.95 mm KTM 350 2023-2025 4091DA
WOSSNER
$214.00Enhance your motorcycle's performance with our premium Piston Kit designed specifically for Gas Gas, Husqvarna, and KTM models. Crafted with precision and durability in mind, this kit ensures optimal efficiency and smooth operation for your engine...09106843- SKU:
- 09106843
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
$214.00Qty in Cart: 0Quantity:Price:$214.00Subtotal: -
Wossner Piston Kit 94.95mm KTM 450 SX-F 2023-2025 4075DA
WOSSNER
$244.00Piston Kit - 94.95 mm - Gas Gas | Husqvarna | KTM - 4075DA Elevate your motorcycle's performance with our precision-engineered piston kit, meticulously crafted for Gas Gas, Husqvarna, and KTM models. This kit ensures a seamless integration of power and...09106844- SKU:
- 09106844
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$244.00Qty in Cart: 0Quantity:Price:$244.00Subtotal:
