Thermal Group Ø55 in Cast Iron for Vespa 50 PK/Special, Ape 50 - Malossi 318691

Cast Iron Thermal Group Ø55 for Vespa 50 PK/Special, Ape 50 - Malossi 318691

🏍️ Features:

• Heating unit Ø 55 in cast iron - Malossi 318691
• • Products reserved exclusively for competitions in places designated for them according to the provisions of the competent sporting authorities. We decline any responsibility for improper use
• • • Cylinder • •
• Material: special self-lubricating, anti-wear cast iron alloys with a very high degree of refinement, obtained by gravity casting with a Shell Molding forming process.
• Processing: on high precision numerical control machine tools.
• Heat exchange surfaces recalculated and increased.
• Exhaust and transfer ducts designed and developed for maximum thermodynamic efficiency.
• Dimensional checks on shape and roughness according to Malossi standards.
• 100% piston-cylinder fit in selections of 0.010-0.005 mm.
• 100% control of hydraulic seals.
• • • Piston • •
• Material: special aluminum alloy with high silicon content and low thermal expansion.
• Processing: on numerical control machines.
• Lightened and strengthened.
• Increased heat exchange surfaces.
• • • Segments • •
• Segments in ductile cast iron with high mechanical resistance.
• • • Head • •
• Material: special die-cast aluminum alloy.
• Geometry of the heat exchange surfaces recalculated and increased.
• Processing on super precise numerical control machines with diamond tools.
• Antioxidant surface treatment.
• Compression seal with Viton gasket.
• Hemispherical combustion chamber with squish and spark plug in the centre.

🏍️ Specific for the following vehicles:
PIAGGIO APE 50 2T / up to 1989
PIAGGIO APE 50 FL 2T / from 1989-1990
PIAGGIO APE 50 FL2 2T / from 1990-1995
PIAGGIO APE 50 FL3 2T / from 1996-1999

VESPA 50 PK HP FL 2T
VESPA 50 PK 2T
VESPA 50 PK FL 2T< br />VESPA 50 PK XL 2T
VESPA 50 SPECIAL