Vespa Cylinder Kit Malossi 75cc, PK50, PK50Xl 50 Special

Product Code: BD02303

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  • Material: special self-lubricating, wear-resistant, highly refined cast iron alloys, obtained by Shell Moulding gravity die-casting.
  • Machining: on numerically controlled high precision machine tools.
  • Recalculated and increased heat exchange surfaces.
  • Exhaust and transfer ports designed and tuned for maximum thermodynamic performance.
  • Dimensional and surface finish quality control performed according to Malossi's internal specifications.
  • Cylinder and piston selected for a 100% fit of 0.010-0.005 mm.
  • Checking of all the seals carried out.


  • Material: special aluminium alloy with high silicon content and low thermal expansion.
  • Machining: on numerically controlled machine tools.
  • Lightened and strengthened.
  • Heat exchange surfaces increased.

Piston rings

  • Piston rings in very strong modular cast iron with ground, wear-resistant.


  • Material: special die-cast aluminium alloy.
  • Geometry of heat exchange surfaces recalculated and increased.
  • Machining: numerically controlled high precision machines with diamond tools.
  • Surface rust prevention treatment.
  • Viton Head Gasket.
  • Hemispheric combustion chamber with centred squish and spark plug.