... cylinder head made from alloy cast iron, sliding bearing, small bulk, light weight. Solid forged steel crankshaft, cylinder ... cylinder head made from alloy cast iron, sliding bearing, small bulk, light weight, less vibration, low noise, high ... Steady time s(Mechanical regulating)≤5 (Electronic regulating )≤328 Coefficient of speed fluctuation %(Mechanical regulating):≤1.5 (Electronic regulating ):≤0 ...