2002 Ducati Superbike 998 Owners Manual - Page 131

Engine Twin cylinder, four-stroke, 90° "L" type, longitudinal. Bore mm: 88 Stroke mm: 61.5 Total displacement cu.cm.: 748 Compression ratio: 1:11.5±0.5 Max. power at crankshaft (95/1/CE): 72 kW - 97HP at 11000 rpm Max torque at crankshaft (95/1/CE): 74 Nm at 9000 rpm Max. rotation speed: 11500 rpm Important Do not exceed specified rotation speed limits under any running condition. Desmodromic timing system (fig. 44) 1) Opening (or upper) rocker. 2) Opening rocker shim. 3) Split rings. 4) Closing (or lower) rocker shim. 5) Return spring for lower rocker. 6) Closing (or lower) rocker. 7) Camshaft. 8) Valve. E 748 748S 748/748S 1 7 6 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. 4 3 8 2 6 5 1 fig. 44 59