2003 Ducati Superbike 999S Owners Manual - Page 169

Engine Twin cylinder, four-stroke, 90° "L" type, longitudinal. Bore: 100 mm Stroke: 63.5 mm Total displacement: 998 cu.cm. Compression ratio: 1:11.4±0.5 Max. power at crankshaft (95/1/EC): 100 kW - 136 HP at 9750 rpm Max torque at crankshaft (95/1/EC): 106 Nm at 8000 rpm Max. rotation speed: 11500 rpm Important Do not exceed specified rotation speed limits under any running condition. Timing system Desmodromic (type) with four valves per cylinder, operated by eight rocker arms (4 opening rockers and 4 closing rockers) and two overhead camshafts. It is operated by the crankshaft through spur gears, belt rollers and toothed belts. Desmodromic timing system (fig. 79) 1) Opening (or upper) rocker. 2) Opening rocker shim. 3) Closing (or lower) rocker shim. 4) Return spring for lower rocker. 5) Closing (or lower) rocker. 6) Camshaft. 7) Valve. E 6 1 2 3 7 5 4 fig. 79 79