Wiseco Top End Kit 0.50mm Oversized to 77.50mm - WK1041

Item # : 187793

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  • Manufacturer: Wiseco


Wiseco Top End Kit - 0.50mm Oversized to 77.50mm


  • Most Wiseco 2-cycle pistons are forged from high-silicone bar stock
  • Greater strength and lower expansion at high temperatures
  • Complete piston kits include High-Performance forged pistons, rings, wrist pins, circlips and top-end gasket kit for one complete engine
  • All Wiseco High-Performance pistons are priced with rings, wrist pins and circlips
  • Wiseco ring types are not interchangeable (i.e., CD is not interchangeable with LC) and fit only Wiseco pistons
  • Oversize pistons require cylinder boring


  • Displacement: 641cc
  • Bore - Standard: 77.00mm
  • Bore - Actual: 77.50mm
  • Bore - Oversize: 0.50
  • Stroke: 68.00mm
  • Cylinders: 2

Item Contents:

  • 3051TD - 77.50 mm Ring Set
  • 602M07750 - Yamaha WaveRunner SuperJet '90-96
  • S423 - PistonPin 20mm x 2.185" NonChromed TW
  • W5300 - TopEnd Gskt Kit Yam WaveRunner 650cc

Manufacturer Part Number: WK1041