Wiseco Forged Piston Kit 81.00 mm 11:1 CR for Yamaha YFM250 R Raptor 2008–2013 4958M08100

Wiseco 4958M08100 is a piston kit for a 81.00 mm bore.

Wiseco catalogue applications

Specifications

• Manufacturer part number: 4958M08100
• Product Series: 4 Stroke Forged Series
• Bore Diameter: 81.00 MM
• Piston Diameter: 80.95 MM
• Piston Oversize: 7.00 MM
• Piston Material: 2618
• Skirt Coating: Yes
• Compression Ratio Actual: 11:1

Included components

Ring Set #3189XG, Piston pin #S688, Circlip #CW17.

Cylinder preparation

Wiseco specifies: Resleeve.

Select by the required finished cylinder bore. Bore diameter and piston diameter are different measurements.

Manufacturer photograph for this reference. Packaging presentation may change.