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Wiseco PK1554 Pro-Lite 2-Stroke Piston Kit 47.5mm Bore for YZ80

(1993-2001 Yamaha YZ80)

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

PK1554
12 reviews
Sale Price

$173.99

Estimated ship date Sunday, November 22

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Product Details

The Wiseco PK1554 Pro-Lite Piston Kit is a complete top-end rebuild solution delivering a 47.5mm (0.50mm oversize) bore for the Yamaha YZ80. Engineered as part of Wiseco's legendary Pro-Lite line, this kit gives riders everything needed to overbore or restore their 2-stroke top end to peak operating condition.

Kit Includes:

  • 1 Pro-Lite forged piston (646M series, 47.5mm bore)
  • Piston ring set
  • Wrist pin (14mm)
  • Round wire circlip/pin locks (pair)
  • Top end gasket set for YZ80 (1993–2001)

Pro-Lite Features:

  • Forged aluminum construction — engineered, forged, and machined in the USA in Mentor, OH
  • Optimized strength-to-weight ratio via dedicated forgings and precision lightening operations for instant throttle response
  • Computer-engineered skirt profile minimizes cylinder wall friction for improved power transfer
  • Anti-detonation ring land geometry eliminates ring blow-by while maximizing compression
  • Improved tensile strength over cast pistons for extended service life under hard riding conditions

Specifications:

  • Bore Size: 47.5mm (0.50mm oversize)
  • Stroke: 47.80mm
  • Displacement: ~84cc (overbore)
  • Cylinders: 1
  • Wrist Pin Diameter: 14mm
  • Note: Cylinder replating or re-sleeving required for oversize bore applications

The Wiseco Pro-Lite is the trusted choice for 2-stroke rebuilds — offering the ideal balance of performance, reliability, and value whether you're a recreational trail rider or a competitive racer.

Products specifications

Fits

1993-2001 Yamaha YZ80

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