... main technical parameters of CY4102BQ Model CY4102BQ Type Vertical, in-line, water-cooled, four strokes, natural aspirated No. of cylinder-bore ... Idling steady speed ≤650 Oil & fuel consumption percent ratio % ≤1.63 Firing order 1-3-4-2 Emission standard Net weight ... truck, 6-7 m passenger bus ect. CY4102 Vertical, in-line, water-cooled, four strokes, natural aspirated