Cylinder Bore Ø 67 mm Stroke 47 mm Displacement 166 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 CDI FORCE MASTER 2 - Code 5515327 Carburation adjusting ± 20% at min/medium/max RPM limiter: + 1000 RPM 4 different maps: curve 0: original cylinder, original camshaft, Malossi exhaust system with DB killer curve 1: Malossi cylinder, original camshaft, original exhaust system curve 2: Malossi cylinder, original camshaft, Malossi exhaust system with DB killer curve 3: Malossi cylinder, original camshaft, Malossi exhaust system with DB killer, Malossi air filter