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Wiseco PK1566 Pro-Lite Forged Piston Kit - 70mm 2-Stroke YZ250 WR250

(1992-1994 Yamaha YZ250; 1992-1994 Yamaha WR250)

Part of: Wiseco Pistons Pro-Lite Forged Piston Kit Bore

Other options in this family: Wiseco Pistons 2454M06100 Wiseco Pistons 2376M07800 Wiseco Pistons 2434M07000 Wiseco Pistons 752M04450 Wiseco Pistons 526M06750

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

PK1566
12 reviews
Sale Price

$267.99

Estimated ship date Thursday, November 26

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Live-in-stock inventory

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Fitment guaranteed

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Product Details

The Wiseco PK1566 is a Pro-Lite forged piston kit designed for 1992–1994 Yamaha YZ250 and WR250 two-stroke engines, featuring a 70mm (677M) overbore diameter. Built on decades of two-stroke piston engineering, the Pro-Lite series delivers an ideal combination of lightweight performance and durability for all-purpose off-road and motocross riding.

Key Features:

  • Forged Pro-Lite construction — extra lightweight design engineered for instant throttle response
  • Computer-engineered piston skirt profile — minimizes cylinder wall friction for improved efficiency and longevity
  • Anti-detonation grooves and precision ring land diameter — eliminate ring blow-by while maximizing power output
  • 70mm overbore bore size — ideal for top-end rebuilds or cylinder overboring applications
  • Complete kit contents — includes forged piston, ring set, wrist pin, and circlip retainers

The Wiseco Pro-Lite piston kit is a trusted choice for two-stroke rebuilds, providing OEM-quality fitment with enhanced performance characteristics over stock. Whether restoring a worn top end or building for more displacement, the PK1566 delivers reliable, race-proven results.

Products specifications

Fits

1992-1994 Yamaha YZ250; 1992-1994 Yamaha WR250

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Engine Type

ICE

Product Series

2 Stroke Pro-Lite Series

Industry

Powersports

Out of Stock Message

Estimated Shipped Date 3-4 Weeks

Bore Diameter

70.00

Product Type

Top End Kits

EBAY Category ID

180159

Skirt Coating

No

Product Market

Dirt Bike

Piston oversize

2.00

Title

Wiseco 2 Stroke Pro-Lite Piston Kit, 70.00 MM Bore

Piston Diameter

69.96

Included Components

Piston #677M07000, Ring Set #2756CD, Wrist Pin #S508, CirClip #CW18, Bearing #B1014, Gasket #W5168

Title - Web

Pro-Lite Yamaha WR250/YZ250 Wiseco Top End Kit - 70.00 mm Bore

fast and easy, low prices quick delivery item AAA+++ will Definately buy from again

Fine

Lots of stock on hand, great prices, plus the website is very clear and easy to navigate.

no problem's very good

quick payment process

Good price

After reporting my order was on back order with 4-6 weeks to deliver. You guys found a way to get it to me in a weeks time. Super!!!! Great job. Thank you Peter

Thx

Great thanks for everything

Awesome place to deal with!! Very fast shipping. Their communication is excellent!! I will buy from them again!!

So far so good

Not bad if you know what your looking for

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