Vespa PK 125 [1982-1991] - Cast iron cylinder kit ø 57.5 pin ø 15

Cast iron cylinder kit for the Vespa PK 125

The MALOSSI cast iron cylinder kit ø 57.5 pin ø 15 is intended for the Vespa PK 125 built between 1982 and 1991. The cylinder is made of cast iron and is designed for use in urban and sports areas. The design combines a cylinder diameter of 57.5 mm with a piston pin diameter of 15 mm.

Execution and construction

The cylinder uses a selected cast iron alloy with a calculated cooling surface. The kit includes a reinforced aluminum piston with a high silicon content. Two self-lubricating piston rings made of cast iron with a rectangular cross section support the low-noise piston profile.

Technical data

• Material: cast
• Piston compression: Racing
• Diameter Ø: 57.5 mm
• Piston pin: 15 mm
• Stroke: 51mm
• Displacement: 132.5 cm³
• Compression ratio: 1:11.4
• Number of piston rings: 2
• Number of openings: 7
• Cylinder head: hemispherical
• Spark plug: central, IW 27
• Recommended carburettor: SHB 20 / PHBL 25
• Manufacturing level: simple

Vehicle assignment and use

The cylinder kit is assigned to the Vespa PK 125, built between 1982 and 1991. The specification is designed for crankshafts with 51 mm stroke. The product feature “Racing” indicates the provision for competitions at designated venues in accordance with the regulations of the responsible sports associations. No liability is assumed for improper use.