Engine: Single cylinder 4-stroke OHV
Bore & stroke: 59.5 x 62 mm
Compression ratio: 6.7:1
Engine Capacity: 172,3cc
Maximum power: 11 h.p. @ 7,000 rpm
Torque / rpm: NA
Distribution: Two overhead valves controlled by a camshaft operated by a chain (OHV)
Ignition: Flywheel-magneto, 6V-40W
Spark plug: 1
Carburettor: Dell'Orto 25 SS fork Earles
Cooling system: Air cooled
Lubrication: Wet sump forced circulation with mechanical gear pump
Transmission: Gear primary, chain final
Clutch: Cable operated with multiple wet disc in oil bath
Gearbox: 4-Speed foot-change
Throttle: Cable operated
Frame type: Open cradle tubular and pressed steel
Front Suspension: Telescopic fork and shock absorbers
Rear Suspension: Swingarm with hydraulic shock absorbers
Front Brake: Drum Ø 180 mm
Rear Brake: Drum Ø 150 mm
Wheelbase: 1,280 mm
Front Tyre: 2.75 x 19 in.
Rear Tyre: 2.75 x 19 in.
Seat: Dual seat
Fuel tank capacity: 14 litres
Fuel consumption: 3 litres per 100 km
Weight: 110 Kg
Top speed: 115 km/h (71.5 mph)
Number of production: 5,000 ex
Having commenced motorcycle production late in 1945 with a 98cc two-stroke, Meccanica Verghera (MV) introduced its first production 4-strokes, the single-cylinder 175CST and CSTL, at the Milan Show in 1952, the newcomers' advanced overhead-cam, unitary construction engine setting them apart from most of the opposition. Their cycle parts too were state-of-the-art, consisting of a duplex loop frame incorporating the engine as a stressed member, oil-damped telescopic front fork, swinging-arm rear suspension, and full-width alloy hubs.
A year later the 175 CS Sport arrived featuring an engine in a higher state of tune that increased maximum power to 15bhp at 8,800rpm and pushed top speed to 135km/h (84mph). Alternative versions with either a race-developed Earles-type leading-link fork or conventional telescopics were offered. It was not just the Sport's cutting-edge technical specification that set the public's pulse racing but also its styling, for the model featured a sculpted fuel tank, almost circular when viewed from above, that soon gained it the popular sobriquet 'Disco Volante' (Flying Saucer). Not surprisingly, the 175 Supersport CSS Disco Volante was soon MV's bestseller.
Source: Hessink's NL