Sunbeam Model 8 (1924-31)

The Sunbeam Model 8 motorcycle was produced between 1924 and 1931. It was powered by a single cylinder, air-cooled, OHV engine with a capacity of 347cc. The engine’s bore and stroke measured 70 x 90mm and it had a dry sump lubrication system. The bike featured an AMAC carburettor and a single exhaust. It had a kick starter and produced 2.1kW/2.75hp of power. The transmission offered 3-speeds and the final drive was via chain.

The frame of the Sunbeam Model 8 had a unique bifurcated front down tube design, while the front suspension had Druid forks. The bike’s rear suspension was rigid but had a spring loaded saddle. It had drum brakes at the front and rear that were of the internal expanding type. The wheels were made of steel and laced with wire spokes.

The Sunbeam Model 8 was manufactured by Marston-Sunbeam, a British motorcycle company.

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Technical specifications:

Make Model: Sunbeam Model 8

Year: 1924 – 31

Engine: Single cylinder, OHV

Capacity: 347 cc / 21.2 cu in

Bore x Stroke: 70 x 90 mm

Cooling System: Air cooled

Lubrication: Dry sump

Induction: AMAC carburettor

Exhaust: Single

Starting: Kick

Power: 2.1 kW / 2.75 hp

Transmission: 3-Speed

Final Drive: Chain

Frame: Bifurcated front down tube

Front Suspension: Druid forks

Rear Suspension: Rigid, spring loaded saddle

Front Brakes: Drum, internal expanding

Rear Brakes: Drum, internal expanding

Wheels: Steel, laced wire spokes

Source: Marston-Sunbeam