Aluminium cylinder 67 pin15 h2o 4-stroke

Cylinder

• 125 cc:
  1. Bore: Ø 67 mm
  2. Stroke: 47 mm
  3. Displacement: 166
• 200 cc:
  1. Bore: Ø 67 mm
  2. Stroke: 58 mm
  3. Displacement: 200
• Compression ratio: 12:1
• 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 chromium-plated special steel alloy.