Italian Motorcycles

Nassetti Sery 49 Gran Turismo 4T 1955

The Sery (from Serenella, one of Cesare's daughters) appeared in 1955-56 was top of the range. It was a single cylinder OHV four-stroke and 80° inclined valves, with a hemispherical combustion chamber. The cylinder was cast iron with integral barrel and it had a one-piece crankshaft.

The clutch was mounted directly on the left end of the crankshaft. A primary transmission with straight-toothed gears delivered power to the three-speed gearbox. Engine lubrication was splash system, without oil pump. The two versions (Turismo and Sport) had power output of 2 and 2.4 hp respectively. Top speed was 60 km/h at 5,500 rpm.

The tubular frame had an unusual structure, very close to a double raised cradle. The famous engineer Cesare Bossaglia worked on their design, before moving to Parilla.

Well over 50% of the mopeds built by Nassetti went to Belgium and Holland.


Engine: Single cylinder 4-stroke OHV

Bore & stroke: 38 x 44 mm

Engine Capacity: 49.8cc

Maximum power: 2.2 h.p. @ 6,500 rpm

Valve: Rods and rockers with two overhead valves inclined at 80° (OHV)

Carburettor: Weber MFM 14

Cooling system: Air cooled

Ignition type: Dynamo - 6 volts - 15 watt

Lubrication: Wet sump forced circulation with mechanical gear pump

Transmission: Gear primary, chain final

Clutch: Cable operated with multiple wet disk

Gearbox: 3-speed with handlebar control

Starter: Kick-starter

Throttle: Cable operated

Frame type: Very close to a double raised cradle, tubular and pressed steel

Front Suspension: Telescopic fork and shock absorbers

Rear Suspension: Swingarm with hydraulic shock absorbers

Front Brake: Drum

Rear Brake: Drum

Front tyre: 2.00 x 18 in.

Rear tyre: 2.00 x 18 in.

Seat: Dual seat

Fuel tank capacity: c.10 litres

Fuel consumption: 1 litre per 75 km

Top speed: 60 km/h (37.28 mph)

Weight: ca. 50 Kg

Source: Hessink's NL

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