Vespa PK S 125 [1983-1991] - cast iron cylinder kit ø 57.5 pin ø 15

MALOSSI cast iron cylinder kit for Vespa PK S 125

The MALOSSI cast iron cylinder kit with a diameter of Ø 57.5 and a pin Ø 15 is intended for the Vespa PK S 125 from the 1983-1991 model year range. The design combines a robust cast construction with a concept tailored to use in urban and sports areas.

Function and design features

The cylinder is made of cast iron and has a newly calculated cooling surface. The reinforced high-silicon aluminum alloy piston has a low-noise profile. Two self-lubricating piston rings with a rectangular cross section support the reliable operation of the kit.

The cylinder kit was developed for longer loads and offers pronounced torque. This makes it suitable for driving situations in which powerful acceleration is required, such as on steeply inclined roads. The stated power range is 12/18.

Technical data

• Material: cast
• Diameter: Ø 57.5 mm
• Pin: Ø 15
• Stroke: 51mm
• Displacement: 132.5 cm³
• Compression ratio: 1:11.4
• Piston rings: 2
• Openings: 7
• Cylinder head: hemispherical
• Spark plug: central, IW 27
• Carburetor recommended: SHB 20 / PHBL 25

Vehicle assignment and use

The kit is assigned to the Vespa PK S 125, built between 1983 and 1991. The product specification specifies it exclusively for use in competitions at designated venues in accordance with the regulations of the relevant sports associations. When using it, the suitability for the intended purpose must be taken into account.