Vespa 125 GTR (1968-78)

The Vespa 125 GTR, produced from 1968 to 1978, had a two-stroke, single-cylinder engine with a capacity of 123.4cc/7.5 cub in, producing a maximum power of 4.6 kW/6.3 hp at 5000 rpm. It had a Dell’Orto SHB 16/16 carburetor, disc valve induction, and contact breaker and coil ignition. With a four-speed grip-shift, constant mesh transmission, it had a direct drive final drive. The frame was a pressed sheet steel, streamlined monocoque structure. The Vespa 125 GTR had front and rear drum brakes, and interchangeable wheels. The dimensions were 1795 mm/70.7 in in length, 710 mm/30.0 in in width, and had a wheelbase of 1220 mm/48.0 in. It weighed 90 kg/198 lbs, and had a fuel capacity of 7.7 L/2.0 US gal. With an average consumption of 2 L/100 km/50 km/l/117 US mpg, it had a top speed of 92 km/h/57 mph. The Vespa 125 GTR was available in blue, China blue, coral red, metallic moon white, and polaris grey. A total of 45,658 units were produced.

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Technical specifications:

Make Model: Vespa 125 GTR

Year: 1968 – 78

Production: 45 658 units

Engine: Two stroke, ingle cylinder

Capacity: 123.4 cc / 7.5 cub in

Bore x Stroke: 52.5 x 57 mm

Compression: 7.3:1

Carburetor: Dell’Orto SHB 16/16

Cooling: Air cooled, centrifugal fan

Fuel Mixture: 1:50

Induction: Disc valve

Ignition: Contact breaker & coil

Starting: Kick start

Battery: 6V

Clutch: Wet, multiplate

Max Power: 4.6 kW / 6.3 hp @ 5000 rpm

Transmission: 4 Speed, grip-shift, constant mesh

Gear Ratios: 1st 15.46 / 2nd 10.79 / 3rd 7.69 / 4th 5.49:1

Final Drive: Direct drive

Frame: Pressed sheet steel, streamlined monocoque structure

Front Brakes: Drum

Rear Brakes: Drum

Wheels: Interchangeable

Front Tyre: 3.5 x 10″

Rear Tyre: 3.5 x 10″

Dimensions: Length: 1795 mm / 70.7 in Width: 710 mm / 30.0 in

Wheelbase: 1220 mm / 48.0 in

Dry Weight: 90 kg / 198 lbs

Fuel Capacity: 7.7 L / 2.0 US gal

Consumption average: 2 L/100 km / 50 km/l / 117 US mpg

Top Speed: 92 km/h / 57 mph

Colours: Blue, China Blue, Coral Red, Metallic Moon White, Polaris Grey

Sources: Wikipedia, Vespafan.ch