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 48.50mm Yamaha YZ80 1985-1987 520M04850
WISECO
$134.95A worn or damaged piston directly cuts into your YZ80's power output and engine reliability. The Wiseco 520M04850 restores—or exceeds—OEM performance with aerospace-grade construction and precision tolerances that maximize combustion efficiency. This...520M04850- SKU:
- 520M04850
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 48.50 MM
- DISPLACEMENT:
- 82 CC
- STROKE LENGTH:
- 45,60 MM
- BORE - OVERSIZE:
- +0,50 MM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 45.60 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
$134.95 -
Wiseco Piston Kit 48.00 mm Yamaha YZ 80 1982-1983 477M04800
WISECO
$134.95The stock piston in your YZ80 is a wear item with a finite lifespan—especially if you're pushing harder on the track or trail. The Wiseco 520M04900 restores lost compression, responsiveness, and reliability while delivering measurable gains in mid-range...520M04900- SKU:
- 520M04900
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 45,60 MM
- BORE SIZE METRIC:
- 49.00 MM
- DISPLACEMENT:
- 82 CC
- STROKE LENGTH METRIC:
- 45.60 MM
$134.95Qty in Cart: 0Quantity:Price:$134.95Subtotal: -
Wiseco Piston Kit Yamaha YZ80 1985-1987 49.5mm 520M04950
WISECO
$144.95The Wiseco 520M04950 is a complete piston kit engineered for the Yamaha YZ80, delivering the precision and durability you need to keep your machine running strong lap after lap. A quality piston kit is essential maintenance for any two-stroke that sees...520M04950- SKU:
- 520M04950
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- +1,50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 49.50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 45.60 MM
- DISPLACEMENT:
- 82 CC
- STROKE LENGTH:
- 45,60 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
$144.95Qty in Cart: 0Quantity:Price:$144.95Subtotal: -
Wiseco Piston Standard Yamaha IT 200 1984 522M06600
WISECO
$184.95When your Yamaha IT200's original piston shows wear, combustion efficiency drops and power delivery suffers. The Wiseco 522M06600 restores—and exceeds—stock performance with forged aluminum construction engineered to handle the demands of serious...522M06600- SKU:
- 522M06600
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 195 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- STROKE LENGTH:
- 57,00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 66.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 57.00 MM
$184.95 -
Wiseco Piston Kit 67.00mm Oversize Yamaha IT200 1984-1986 522M06700
WISECO
$193.95If you're running a 1984-1986 Yamaha IT200, a worn or damaged piston directly impacts throttle response, power delivery, and engine reliability. The Wiseco 522M06700 restores—and exceeds—OEM performance with aerospace-grade 4032 aluminum and a precision...522M06700- SKU:
- 522M06700
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 57.00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 67.00 MM
- DISPLACEMENT:
- 195 CC
- STROKE LENGTH:
- 57,00 MM
$193.95 -
Wiseco Piston 2.00mm Oversize Yamaha YZ80 1980 508M05000
WISECO
$144.95When you're pushing a YZ80 to its limits on the track or trail, factory pistons won't cut it. The Wiseco 508M05000 is precision-engineered for 2-stroke performance, delivering the compression efficiency and durability needed to survive aggressive riding...508M05000- SKU:
- 508M05000
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 45.60 MM
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH:
- 45,60 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 50.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 82 CC
$144.95Qty in Cart: 0Quantity:Price:$144.95Subtotal: -
Wiseco PE175 1980-1984 Piston Kit 490M06200
WISECO
$154.95If you're running a 1980–1984 Suzuki PE175, a worn piston kit will tank your engine's compression, throttle response, and overall reliability. The Wiseco 490M06200 delivers a complete, ready-to-install solution with precision-machined components and...490M06200- SKU:
- 490M06200
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- FORGED SERIES
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 62.00 MM
- DISPLACEMENT:
- 172 CC
- PISTON DIAMETER METRIC:
- 61.92 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 57.00 MM
- UNITS:
- KIT
$154.95Qty in Cart: 0Quantity:Price:$154.95Subtotal: -
Wiseco Piston Kit Standard Bore 66mm Kawasaki KDX 200 1986-2006 711M06600
WISECO
$199.95If your Kawasaki KDX200 is losing compression, burning oil, or showing signs of worn ring wear, a piston kit refresh is essential to restore power delivery and engine reliability. Wiseco's 711M06600 is CNC-machined to OEM specifications with premium...711M06600- SKU:
- 711M06600
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH:
- 58,00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 66.00 MM
- DISPLACEMENT:
- 198 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 58.00 MM
$199.95 -
Wiseco Piston Kit 66.50mm Oversize Kawasaki KDX200 1986-1988 711M06650
WISECO
$199.95The Wiseco 711M06650 is engineered for riders who demand precision and reliability from their 2-stroke engine. If you're rebuilding a KDX200 or pushing for better throttle response and peak power, this complete piston kit delivers the CNC-machined...711M06650- SKU:
- 711M06650
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- +0,50 MM
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH:
- 58,00 MM
- STROKE LENGTH METRIC:
- 58.00 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 66.50 MM
- DISPLACEMENT:
- 198 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$199.95 -
Wiseco Piston 1986 Kawasaki KDX 200 711M06700
WISECO
$184.95If you're running a 1986 Kawasaki KDX 200, piston wear directly impacts compression, throttle response, and top-end reliability—especially on a 2-stroke where every combustion cycle matters. The Wiseco 711M06700 delivers OEM-equivalent fitment with...711M06700- SKU:
- 711M06700
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 67.00 MM
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH:
- 58,00 MM
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 198 CC
- STROKE LENGTH METRIC:
- 58.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$184.95Qty in Cart: 0Quantity:Price:$184.95Subtotal: -
Wiseco Piston Kit 67.50mm for 1996-1999 KTM 250 SX 694M06750
WISECO
$199.95If you're running a 1996-1999 KTM 250 SX at the edge of its limits, a worn or damaged piston directly translates to lost compression, power, and reliability. The Wiseco 694M06750 replaces all critical components—piston, rings, wrist pin, and circlips—in...694M06750- SKU:
- 694M06750
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON
- DISPLACEMENT:
- 249,6 CC
- STROKE LENGTH:
- 69,50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 69.50 MM
$199.95Qty in Cart: 0Quantity:Price:$199.95Subtotal: -
Wiseco Piston Kit Standard 66.40mm Bore Honda CR250R 1997-2001 702M06640
WISECO
$221.95If you're running a CR250R at the track or on the trail, piston durability and consistent power delivery directly impact your lap times and engine longevity. Wiseco's forged high-silicon aluminum construction delivers the strength needed for sustained...702M06640- SKU:
- 702M06640
- Availability:
- Ships Same Business Day
- Weight:
- 0.64 LBS
- STROKE LENGTH:
- 72,00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 66.40 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED
$221.95 -
Wiseco Piston Kit 67.50mm for Honda CR250R 2002-2004 702M06750
WISECO
$221.95When you're pushing your CR250R to the limit, a stock piston won't cut it. The Wiseco 67.50mm piston kit delivers the precision engineering and durability you need to maintain peak performance lap after lap, whether you're competing at the highest level...702M06700- SKU:
- 702M06700
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 67.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,60 MM
- BORE - OVERSIZE METRIC:
- +0.60 MM
- DISPLACEMENT:
- 249 CC
- STROKE LENGTH:
- 72,00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- RIDING STYLE:
- OFF-ROAD
$221.95Qty in Cart: 0Quantity:Price:$221.95Subtotal: -
Wiseco Piston 1.10mm Oversize for 2001 Honda CR250R 702M06750
WISECO
$199.95When you're pushing your CR250 to the edge, your factory piston becomes the weakest link. The Wiseco 702M06750 is built to handle the demands of high-RPM racing with a high-silicon aluminum forging that resists detonation and thermal stress far better...702M06750- SKU:
- 702M06750
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- DISPLACEMENT:
- 249 CC
- BORE - OVERSIZE:
- +1,10 MM
- BORE - OVERSIZE METRIC:
- +1.10 MM
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 72,00 MM
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
$199.95 -
Wiseco Piston Kit 66.4mm Honda CR250R 2002-2004 802M06640
WISECO
$224.95When your CR250R's piston shows signs of wear or you're rebuilding after a top-end failure, a quality replacement is non-negotiable. The Wiseco 702M06800 delivers OEM-equivalent fitment with materials engineered to handle the high RPM demands of...702M06800- SKU:
- 702M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- +1,60 MM
- BORE SIZE METRIC:
- 68.00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE METRIC:
- +1.60 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 72,00 MM
- UNITS:
- EACH
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit 66.40mm Standard Bore Suzuki RM250 1996-1997 681M06640
WISECO
$207.95The Wiseco 681M06640 is engineered for riders who demand reliability and responsive power from their RM250. Wiseco's forged aluminum construction delivers the durability needed for competitive riding and extended trail sessions, while precision...681M06640- SKU:
- 681M06640
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- DISPLACEMENT:
- 249 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 72,00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 66.40 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
$207.95Qty in Cart: 0Quantity:Price:$207.95Subtotal: -
Wiseco Piston Kit 48.00mm 0.50mm Oversize for Suzuki RM80 1991-2001 645M04800
WISECO
$134.95The Wiseco 645M04800 is engineered for Suzuki RM80 owners ready to restore lost compression and revive engine responsiveness after thousands of riding hours. A properly sized piston kit is critical for maintaining the seal integrity and power delivery...645M04800- SKU:
- 645M04800
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 48.00 MM
- DISPLACEMENT:
- 82 CC
- BORE - OVERSIZE:
- +0,50 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 46.80 MM
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 46,80 MM
$134.95Qty in Cart: 0Quantity:Price:$134.95Subtotal: -
Wiseco Piston Kit Suzuki RM 80 1989-1990 48.50 mm 579M04850
WISECO
$134.95The Wiseco 645M04850 is a complete piston kit engineered for Suzuki RM80 2-stroke engines, delivering the precision and durability competitive riders demand. If you're rebuilding after a top-end failure or upgrading for increased power output, this...645M04850- SKU:
- 645M04850
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 48.50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- DISPLACEMENT:
- 82 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 46,80 MM
- STROKE LENGTH METRIC:
- 46.80 MM
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON
$134.95Qty in Cart: 0Quantity:Price:$134.95Subtotal: -
Wiseco Piston Kit Kawasaki KX60 1983-2003 43mm Standard 648M04300
WISECO
$128.95If you're running a KX60 hard enough to wear out the factory piston, you need a replacement that matches your commitment to performance. Wiseco's 648M04300 kit delivers the precision tolerances and material quality required to restore—or exceed—your...648M04300- SKU:
- 648M04300
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- BORE SIZE METRIC:
- 43.00 MM
- STROKE LENGTH:
- 41,60 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 60 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 41.60 MM
$128.95Qty in Cart: 0Quantity:Price:$128.95Subtotal: -
Wiseco Piston Kit Kawasaki KX 60 1990-2003 43.5mm Bore 648M04350
WISECO
$119.95If you're running a KX 60 and want to restore or maximize engine performance, a quality piston kit is non-negotiable. Wiseco's 648M04350 delivers the precision fit and durability that 2-stroke engines demand, whether you're prepping for competition or...648M04350- SKU:
- 648M04350
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE:
- +0,50 MM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 41.60 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 43.50 MM
- ENGINE TYPE:
- 2-STROKE
- DISPLACEMENT:
- 60 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH:
- 41,60 MM
- UNITS:
- EACH
$119.95Qty in Cart: 0Quantity:Price:$119.95Subtotal:
