Year of presentation : 1977
Years of manufacture : 1978-1983
Engine : 4-stroke, single-cylinder, air-cooled - bore x stroke 74 x 57.8 mm - total displacement 248.5 cc - compression ratio 9:1 - overhead camshaft and kingpin with conical camshafts and two valves in the cylinder head - wet sump with pump - Amal 627/27 carburettor - multi-disc wet clutch - 5-speed gearbox - primary drive by gears - secondary drive by chain. This model features the "wide" crankcase which had a larger oil capacity and allowed for the inclusion of a fifth gear.
Chassis : tubular steel frame - telescopic hydraulic front fork - swingarm rear fork with 2 hydraulic shock absorbers - Ø 180 mm drum front brake - Ø 160 mm drum rear brake - tyres: 3.25 x 18" front, 3.50 x 18" rear.
Electrical system: The lighting is battery-powered, and the battery is recharged by a MOTOPLAT alternator via a rectifier. The YUASA battery (12V, 12Ah), which is charged by the alternator and rectifier, powers the parking lights (city lights and taillights) and turn signals when the engine is off.
Dimensions: wheelbase 1370 mm - dry weight 135 kg - fuel tank 15.5 litres.
Performance : 21 hp at 8000 rpm - maximum speed 125 km/h in normal position - fuel consumption 4 litres/100 km.
Colour scheme: metallic blue paint for the tank, chrome for the headlight and mudguards, and black for the frame and swingarm.
Clarification note: There were also two versions of this model, which emerged as a cheaper alternative to the Forza 350. The second version included a front disc brake, and that was the most significant technical upgrade. It also featured a change of colours, from blue to orange, which was also the colour of the second-generation Forza. The electrical system was upgraded to 12 volts instead of the 6 volts used previously in motorcycles. There was a third version that inherited the entire chassis of the 1980 Desmo 500.
Source: perso.wanadoo.es (archive)
