Malossi Cylinder Kit 187cc, 70mm BBK for Vespa, Aprilia, Piaggio Leader Engine ET4

Malossi Cylinder Kit 187cc. 70mm BBK for Vespa. Aprilia. Piaggio Leader Engine ET4

Cylinder

• Bore 70 mm;
• Stroke 48.6 mm;
• Displacement 187.6;
• Compression ratio 11.5:1.
• Material: primary aluminium alloy with a high content of hardened and tempered silicon. cylinder liner with silicon carbide coating in a galvanic nickel die and crossed smoothing with two diamond passages with very limited tolerances.
• Machining: on machine tools with high precision numerical control.
• Cylinder-piston connection with an allowance of 0.05 mm.
• Recalculated and upgraded heat exchange surfaces.

Piston

• Ultra compact with 3 rings.
• Material: special aluminium alloy with high silicon content. low thermal expansion and a tin facing on the sliding surfaces.
• Machining on machine tools with numerical control.
• Lightened and reinforced.
• Upgraded heat exchange surfaces.

Piston rings

• Special rings with high sliding ease and very high mechanical resistance.
• I?? ring compression in nitrided and chromium steel.
• II?? special cast iron ring.
• Three – piece scraper ring made of chromiumplated special steel alloy.