Cylinder -MALOSSI 270 cc V4 Ø=75.5mm - Piaggio Quasar 250 cc - Vespa GTS250i.E., GTV250i.E., Piaggio X7 250i.E., Piaggio X8 250, Piaggio X8 250i.E., Piaggio X9 Evolution 250, Piaggio X7 250i.E., Piaggio XEvo 250i.E., Beverly 250/250i.E., Aprilia Sportcit

TECHNICAL DATA

cylinder

• bore: Ø75,5mm
• stroke: 60mm
• capacity: 268ccm
  
• material: First class aluminium alloy with high content of tempered silicon, liner with silicon carbide coating coated with galvanic nickel matrix and crossed polishing with two diamond passes with very low tolerances.
• machining: on NC precision machine tools.
• piston-cylinder adaptation in sections of 0.05 mm.
• newly calculated and increased heat exchange surfaces.

piston

• Supercompact with three piston rings.
• Material: first-class silicon-aluminium alloy with high mechanical resistance, low thermal expansion and with chemical wear protection on the sliding surfaces.
• Light and reinforced.
• Heat exchange surfaces enlarged.

piston rings

• compression - special piston ring with high sliding capacity and very high mechanical resistance made of nitrided special steel.
• 1° oil scraper ring - made of chromed S10 nodular cast iron.
• 2° oil scraper ring - three parts made of chromed alloy steel