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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VINTCO Top End Piston Kit KTA05-0.5
VINTCO
$258.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106433- SKU:
- 09106433
- Availability:
- Ships Same Business Day
- Weight:
- 1.71 LBS
$258.85 -
VINTCO Top End Piston Kit KTA05-1.0
VINTCO
$258.85Top End Piston Kit KTA05-1.0 Complete piston kit for high-performance engines. Includes piston, rings, pin, and clips for easy installation. Top end bearing ensures smooth operation and longevity. Full gasket kit included: head, base,...09106434- SKU:
- 09106434
- Availability:
- Ships Same Business Day
- Weight:
- 1.71 LBS
$258.85 -
VINTCO Top End Piston Kit KTA05-1.5
VINTCO
$258.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106435- SKU:
- 09106435
- Availability:
- Ships Same Business Day
- Weight:
- 1.61 LBS
$258.85 -
VINTCO Top End Piston Kit KTA06-00
VINTCO
$229.95Top End Piston Kit KTA06-00 Complete piston kit for optimal engine performance Includes high-quality piston, rings, and pin Comes with durable clips and top-end bearing Full gasket kit included: head, base, intake, and exhaust gaskets ...09106436- SKU:
- 09106436
- Availability:
- Ships Same Business Day
- Weight:
- 1.66 LBS
$229.95 -
VINTCO Top End Piston Kit KTA06-0.5
VINTCO
$258.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106437- SKU:
- 09106437
- Availability:
- Ships Same Business Day
- Weight:
- 1.56 LBS
$258.85 -
VINTCO Top End Piston Kit KTA06-1.0
VINTCO
$258.85Top End Piston Kit KTA06-1.0 Complete piston kit for high-performance engines Includes piston, rings, pin, and clips for easy installation Top end bearing ensures smooth operation and durability Full gasket kit includes head, base,...09106438- SKU:
- 09106438
- Availability:
- Ships Same Business Day
- Weight:
- 1.61 LBS
$258.85 -
VINTCO Top End Piston Kit KTA06-1.5
VINTCO
$229.95Top End Piston Kit KTA06-1.5 Complete piston kit for optimal engine performance Includes high-quality piston, rings, pin, and clips Top end bearing ensures smooth operation Comprehensive gasket kit featuring head, base, intake, and...09106439- SKU:
- 09106439
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
$229.95 -
VINTCO Top End Piston Kit KTS03-00
VINTCO
$206.85Top End Piston Kit KTS03-00 Complete kit for optimal engine performance Includes high-quality piston and rings for durability Comes with pin and clips for easy installation Features a top end bearing for smooth operation Full gasket...09106440- SKU:
- 09106440
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$206.85 -
VINTCO Top End Piston Kit KTS03-0.5
VINTCO
$206.85Top End Piston Kit KTS03-0.5 Complete kit for top-end engine rebuilds Includes high-quality piston, rings, pin, and clips Features a top-end bearing for improved performance Comes with a full gasket set: head, base, intake, and exhaust ...09106441- SKU:
- 09106441
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$206.85 -
VINTCO Top End Piston Kit KTS03-1.0
VINTCO
$206.85Top End Piston Kit KTS03-1.0 Complete kit for optimal engine performance Includes piston, rings, pin, and clips for easy installation Top end bearing ensures smooth operation Comprehensive gasket set includes head, base, intake, and...09106442- SKU:
- 09106442
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$206.85 -
VINTCO Top End Piston Kit KTS03-1.5
VINTCO
$206.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106443- SKU:
- 09106443
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$206.85 -
VINTCO Top End Piston Kit KTS01-00
VINTCO
$174.85Top End Piston Kit KTS01-00 Complete kit for top-end engine rebuilds Includes high-quality piston, rings, and pin Comes with durable clips for secure assembly Features a top-end bearing for optimal performance Full gasket kit...09106444- SKU:
- 09106444
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$174.85 -
VINTCO Top End Piston Kit KTS01-0.5
VINTCO
$173.95Top End Piston Kit KTS01-0.5 Complete piston kit for enhanced engine performance Includes high-quality piston, rings, and pin for durability Features clips and top end bearing for easy installation Comprehensive gasket kit includes head,...09106445- SKU:
- 09106445
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$173.95 -
VINTCO Top End Piston Kit KTS01-1.0
VINTCO
$173.95Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106446- SKU:
- 09106446
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$173.95 -
VINTCO Top End Piston Kit KTS01-1.5
VINTCO
$173.95Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106447- SKU:
- 09106447
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
$173.95 -
VINTCO Top End Piston Kit KTS02-00
VINTCO
$185.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106448- SKU:
- 09106448
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
$185.85 -
VINTCO Top End Piston Kit KTS02-0.5
VINTCO
$185.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106449- SKU:
- 09106449
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
$185.85 -
VINTCO Top End Piston Kit KTS02-1.0
VINTCO
$185.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106450- SKU:
- 09106450
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
$185.85 -
VINTCO Top End Piston Kit KTS02-1.5
VINTCO
$185.85Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106451- SKU:
- 09106451
- Availability:
- Ships Same Business Day
- Weight:
- 1.02 LBS
$185.85 -
VINTCO Top End Piston Kit KTY16-00
VINTCO
MSRP: $263.85$261.95Top End Piston Kit Includes a piston, rings, pin and clips, top end bearing and a full top-end gasket kit (head gasket, base gasket, intake gasket, and exhaust gasket)09106452- SKU:
- 09106452
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
MSRP: $263.85$261.95
