2003 Ducati SuperSport 620 S Owners Manual - Page 142

E Engine Twin cylinder, four-stroke, 90° "L" type, longitudinal. Bore: 80 mm. Stroke: 61.5 mm. Total displacement: 618 c. c.. Compression ratio ±0.5:1: 10.5. Max. power at crankshaft (95/1/CE): 45 kW - 61 HP at 8750 rpm. Max torque at crankshaft (95/1/CE): 54 Nm-5.5 Kgm at 6500 rpm. Derated version Max. power at crankshaft (95/1/CE): 24 kW - 32.6 HP at 9500 rpm. Max torque at crankshaft (95/1/CE): 42 Nm-4.3 Kgm at 3500 rpm. Important Do not exceed specified rotation speed limits under any running condition. Timing system Desmodromic (type) with two valves per cylinder, operated by four rockers (2 opening rockers and 2 closing rockers) and an overhead camshaft. It is operated by the crankshaft through spur gears, belt rollers and toothed belts. Desmodromic timing system (fig. 70) 1) Opening (or upper) rocker arm. 2) Opening rocker arm shim. 3) Split rings. 4) Closing (or lower) rocker arm shim. 5) Return spring for lower rocker arm. 6) Closing (or lower) rocker arm. 7) Camshaft. 8) Valve. 1 5 2 3 4 6 66 7 8 fig. 70