2001 Ducati SportTouring ST4 Owners Manual - Page 131

E ST2 Engine Twin cylinder, four-stroke, 90° "L" type, longitudinal. Bore: 94 mm Stroke: 68 mm Total displacement: 944 c.c. Compression ratio: 1:10.2±0.5 Max. power at crankshaft (95/1/CE): 61 kW - 83 HP at 8500 rpm Max torque at crankshaft (95/1/CE): 82 Nm at 6500 rpm Max. rotation speed 9000 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. 50) 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. 1 5 2 3 4 6 66 7 8 fig. 50