Vespa PK S Automatic 125 [1984-1989] - cast iron cylinder kit ø 57.5 pin ø 15

MALOSSI cast iron cylinder kit for Vespa PK S Automatic 125

The MALOSSI cast iron cylinder kit is designed for the Vespa PK S Automatic 125 built between 1984 and 1989. The cylinder is made of cast iron and has a diameter of 57.5 mm. The pin has a diameter of 15 mm. The kit thus offers a clearly defined technical basis for the intended structure.

Structure and technical features

The cylinder uses a selected cast iron alloy with calculated cooling area. The kit includes a reinforced piston made of high silicon aluminum alloy. The low-noise piston profile works with two self-lubricating piston rings made of cast iron with a rectangular cross-section.

• Material: cast
• Diameter Ø: 57.5 mm
• Pin Ø: 15 mm
• Stroke: 51mm
• Capacity: 132.5 cm³
• Compression ratio: 1:11.4
• Piston compression: Racing
• Number of piston rings: 2
• Number of openings: 7
• Head: hemispherical
• Spark plug: Central IW 27
• Recommended carburetors: Shb 20 / phbl 25

Vehicle assignment

The cylinder kit is intended for the Vespa PK S Automatic 125, built between 1984 and 1989.

Factual usage information

This product is intended exclusively for use in competitions at designated venues in accordance with the regulations of the relevant sports associations. No liability is assumed for improper use. Assembly instructions are available as a technical document.