Vespa PK50 (1963-84)

The Vespa PK50 motorcycle was produced between 1963 and 1984 and came in three different models, the Vespa 90, 90 SS, and 90 Racer. The engine is a two-stroke, single-cylinder with a capacity of 88.5cc and a compression ratio of 8.7:1. The carburetor is a Dell’Orto SHB 16/10 and it uses a forced air cooling system. Ignition is provided by a flywheel magneto coil and starting is done through a kickstart. Its clutch is oil bath, multi-plate and it has a maximum power of 4.4 kW or 6 hp at 6000rpm. It has three gears (4 gears for the SS and Racer) and a direct drive for the final drive. The Vespa PK50’s frame is pressed sheet steel with streamlined monocoque structure and its suspension features a front coil spring with hydraulic shock absorber and a rear coil spring with hydraulic shock absorber as well. The front and rear brakes are 125mm and 150mm drums, respectively. The Vespa PK50 has pressed steel flanges for wheels which are interchangeable and split rims. Its measurements are 1665 mm in length, 670 mm in width, and 1015 mm in height with a wheelbase of 1180 mm and a ground clearance of 225 mm. The scooter has a dry weight of 73 kg and a fuel capacity of 5.2 L with a reserved fuel capacity of 0.7 L. It has a fuel consumption of 1.8 L/100 km and a top speed of 93 km/h. The Vespa PK50 was available in blue and red colors. This information comes from Scooterhelp.com and ve-uk.com.

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Technical specifications:

Make Model: Vespa 90, 90 SS and 90 Racer

Year: 1963-84

Engine: Two stroke, single cylinder

Capacity: 88.5 cc / 5.4 cub in

Bore and Stroke: 47 x 51 mm

Mixture: 1:50

Compression Ratio: 8.7:1

Carburettor: Dell’Orto SHB 16/10

Cooling: Forced air cooled

Battery: 6V

Induction: Rotary valve

Ignition: Flywheel magneto coil

Starting: Kick start

Spark Plug: Bosch W340 T1/T or /U, Champion L86

Clutch: Oil bath, multi plate

Max Power: 4.4 kW / 6 hp @ 6000rpm

Transmission: 3 gears (4 gears for the SS and Racer)

Gear ratios for SS and Racer: 1st 14.74 / 2nd 9.80 / 3rd 7.06 / 4th 5.31:1

Final Drive: Direct drive

Frame: Pressed sheet steel with streamlined monocoque structure

Front Suspension: Coil spring and hydraulic shock absorber

Rear Suspension: Coil spring and hydraulic shock absorber

Front Brakes: 125 mm drum

Rear Brakes: 150 mm drum

Wheels: Pressed steel flanges, interchangeable, split rims

Front Tyre: 3 x 10″

Rear Tyre: 3 x 10″

Dimensions: Length: 1665 mm / 65.6 in Width: 670 mm / 26.4 in Height: 1015 mm / 40.0 in

Wheelbase: 1180 mm / 46.5 in

Ground Clearance: 225 mm / 8.9 in.

Turning Radius: 1650 mm / 64.9 in

Dry Weight: 73 kg / 161 lbs

Fuel Capacity: 5.2 L / 1.3 US gal

Reserve: 0.7 L / 0.18 US gal

Consumption: 1.8 L/100 km / 55 km/l / 130 US mpg

Top Speed: 93 km/h / 57.8 mph

Colours: Blue, Red

Source: Scooterhelp.com, ve-uk.com