Vespa PK50 N Speedmatic (1992-96)

The Vespa PK50 N Speedmatic was a two-stroke, single cylinder motorcycle produced from 1992 to 1996. It had a capacity of 49.8cc and a compression ratio of 9.1:1. The carburettor was a Dell’Orto SHB 16/10, and it had a 1:50 fuel mixture. The ignition system was a flywheel magneto, and it started with a kick-start. The clutch was an oil bath multi-plate type, and it had a maximum power output of 2.7 kW at 7000 rpm. The transmission was a 4-speed grip shift, and the gear ratios were 1st 26.88 / 2nd 17.74 / 3rd 12.78 / 4th 9.62:1. The final drive was direct, and it had a pressed sheet steel frame with a streamlined monocoque structure. The suspension was a trailing arm coil spring and damper in the front, and a coil spring damper in the rear. The brakes were 150mm drum in both the front and the rear, and the wheels were interchangeable pressed steel flanges. The dimensions of the motorcycle were 1675mm in length, 700mm in width, and 1070mm in height. The wheelbase was 1175mm, the ground clearance was 252mm, and the dry weight was 77kg. The fuel capacity was 6.2 liters, with an additional 1.2 liters in reserve. The average fuel consumption was 1.4 liters/100 km, and the top speed was 70 km/h.

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Technical specifications:

Make Model: Vespa PK 50 N Speedmatic

Year: 1992 – 96

Engine: Two stroke, single cylinder

Capacity: 49.8 cc / 3.0 cub in

Bore x Stroke: 38.4 x 43 mm

Compression Ratio: 9.1:1

Mixture: 1:50

Carburettor: Dell’Orto SHB 16/10

Cooling: Air cooled with centrifugal fan

Battery: 1 x 6V – 9.5 Ah batteries

Induction: Rotary valve

Ignition: Flywheel magneto

Starting: Kick start

Spark Plug: Bosch W225 T1

Clutch: Oil bath, multi plate

Max Power: 2.7 kW / 3.7 Hp @ 7000 rpm

Transmission: 4 Speed, grip shift

Gear Ratios: 1st 26.88 / 2nd 17.74 / 3rd 12.78 / 4th 9.62:1

Final Drive: Direct drive

Frame: Pressed sheet steel with streamlined monocoque structure

Front Suspension: Trailing arm, coil spring, damper

Rear Suspension: Coil spring, damper

Front Brakes: 150 mm drum

Rear Brakes: 150 mm drum

Wheels: Pressed steel flanges, interchangeable

Front Tyre: 3 x 10″

Rear Tyre: 3 x 10″

Dimensions: Length: 1675 mm / 65.9 in Width: 700 mm / 27.6 in Height: 1070 mm / 42.0 in

Wheelbase: 1175 mm / 46.5 in

Ground clearance: 252 mm / 9.9 in

Dry Weight: 77 kg / 169.7 lbs

Fuel Capacity: 6.2 L / 1.6 US gal

Reserve: 1.2 L / 0.32 US gal

Consumption average: 1.4 L/100 km / 71.4 km/l / 168 US mpg

Top Speed: 70 km/h / 43.5 mph