Throughout the early 1950s it was Gilera's road-racers that grabbed the headlines just as they had in pre-war days, winning the 500cc World Championship on no fewer than six occasions between 1950 and 1957.
Following its withdrawal from Grand Prix road racing, Gilera turned increasingly to off-road competition, principally the International Six Days Trial, as a means of keeping its name in the public eye.
Regolarità (Regularity) 'Six Days' enduro models were offered in 98cc, 125cc and 175cc capacities, all equipped with the necessities for off-road competition: 21" front wheel, 'knobby' tyres, upswept exhaust, wide handlebars and generous ground clearance.
Engine: Single cylinder four-stroke OHV
Bore & stroke: 60 x 61 mm
Compression ratio: 10:1
Engine Capacity: 175cc
Maximum power: 11.5 h.p. @ 8,500 rpm
Valves per cylinder: 2
Carburettor: Dell'Orto UB 24 BS
Cooling system: Air cooled
Lubrication: Wet sump forced circulation with mechanical gear pump, cup capacity 1.6 litres
Transmission: Gear primary, chain final
Clutch: Cable operated with multiple wet disc in oil bath
Gearbox: 5-Speed foot-change
Throttle: Cable operated
Frame type: Double cradle open in steel tubes, sleeve inclination 27 °
Front Suspension: Telescopic fork and shock absorbers
Rear Suspension: Swingarm with hydraulic shock absorbers
Front Brake: Drum
Rear Brake: Drum
Front Tyre: 2.75 x 21 in.
Rear Tyre: 2.25 x 21 in.
Seat: Dual seat
Fuel tank capacity: 10 litres
Fuel consumption: 3.5 litres per 100 km.
Top speed: 100 Km/h (62 mph)
Source: Hessink's NL
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