| | | | First look: Moto Morini 9 1/2 |  Written: 29/11/2007 : 12:30. Read 3550 times (22/day). | | The integrality of this filed article is for Premium Members. | The name 9 1/2 is an homage to the legendary 3 1/2 twin cylinder of the 1970s. At the same time intended as a tourer, a naked sport bike, and a motorcycle for daily commuting, the 9 1/2 features a powerful 1187cc engine mounted on a tubular trellis frame... evolution of the Corsaro.
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DESIGN AND FUNCTIONALITY.
The bike’s aesthetics is the product of Marabese Design. The main element of the motorcycle is the high-capacity tank (21 litres). The wide seat practically fuses into the light tail, making it seem one piece. Its shape and covering prevent the passenger from slipping forward when the bike brakes.
The technical base is totally exposed and is exclusive for the 9 1/2: the frame features an innovative heavily reinforced rear to accommodate a cantilever side shock absorber combined with a strong swing arm with oval-sectioned tubes.
On the righthand side the single silencer, fully reflecting Moto Morini styling, is thermally insulated to an optimum degree.
Equally robust is the front of the bike marked by a solid 50 mm fork with increased travel.
THE BIALBERO CORSACORTA TWIN CYLINDER ENGINE.
The 9 1/2 is a large-displacement road bike mounted with the 1187 cc Bialbero CorsaCorta twin-cylinder engine that develops 117 Hp at 8500 rpm. The engine’s layout is compact, characterised by the 87° V layout of the cylinders and by the innovative solution of the integral casing. Compared to traditional solutions, it offers diverse advantages: the stiffness of the whole makes the engine a loadbearing element, serving to simplify the layout of the frame; the ease in assembling and disassembling means that work can be done on the engine both during production and servicing (for example, the lower part of the engine can be opened to give access to the gearbox and crankshaft without the need to disassemble heads from the casing); the pistons and cylinders can be disassembled without opening the casing by using the lateral openings; and there is no longer the need to join the two semi-casings, typical of motorbike engines, which translates into huge benefits for production, service and the cost of spare parts.
The engine by Franco Lambertini has been specially conceived for this bike and vaunts thermodynamic features different from those of the twin-cylinder engine designed for the Corsaro. Efforts were made to reduce the intake pipes and the diameter of the valves and to upgrade engine timing, while the compression ratio was increased to improve the progression at low rpm and reduce fuel consumption. The result is a 117 Hp (86 kW ) at 8500 rpm and 102 Nm torque at 6700 rpm.
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