Home WORLD Vintage Matchless G80 1955 500cc One Cylinder Motorcycle Start Up

Vintage Matchless G80 1955 500cc One Cylinder Motorcycle Start Up

The Matchless G80 is a single cylinder 500 cc British motorcycle built by Associated Motorcycles (AMC) between 1946 and 1966. During the 1950s and 1960s, the main export product for AMC was the AJS/Matchless range – the road bikes were very similar, often with only the badges distinguishing one marque from the other; the equivalent AJS being the Model 18.

source/image(PrtSc): classic-motorcycle.com

The 500 cc “long stroke” G80CS was produced from 1951 through 1955. In 1956 it was replaced by the shorter stroke, larger bore models that used the same numeric codes.

The bore of these early G80CS’s was 82.5 mm (3.25″), while the 1956 through 1966 “short stroke” (final version) models had a bore of 86 mm.The engine is housed in a rigid frame with Teledraulic front fork, the ruggedly built overhead-valve engine drove via a four-speed gearbox.


Hairpin valve springs were adopted for 1949 and a swinging-arm frame introduced, the latter initially for export only but available in the UK from 1950./classic-motorcycle.com

  • Manufacturer: Matchless
  • Model: G80
  • Year: 1955
  • Displacement: 498 ccm
  • Cylinder: 1
  • Engine type: 4-stroke / ohv
  • Bore / Stroke: 82.5 x 93 mm
  • Power: 28hp @ 5600 RPM
  • Compression Ratio: 1:7.3
  • Weight: 177 kg
  • Top Speed: 126 km/h