Sunbeam S8 (1949-56)

Make Model: Sunbeam S8 500


Year: 1949 – 56
Production: 8 530 units
Engine: Parallel twin, SOHC
Capacity: 487 cc / 29.7 cu in
Bore x Stroke: 70 x 63.5 mm
Compression Ratio: 6.5:1
Cooling System: Air/Oil cooled
Lubrication: Wet sump
Starting: Kick
Electrical system: 6V
Max Power: 18.6 kW / 25 hp @ 6000 rpm
Clutch: Single plate, dry
Transmission: 4-Speed
Final Drive: Shaft
Frame: Twin cradle, steel
Front Suspension: Telescopic, one way damped
Rear Suspension: Plunger, spring loaded saddle
Front Brakes: Drum, leading shoe, 203 mm / 8″
Rear Brakes: Drum, leading shoe, 203 mm / 8″
Wheel, Front: 4.50 x 16″
Wheel, Rear: 4.75 x 16″

Tyres, Front: 4JA x 16″
Tyres, Rear: 43A x 16″
Wheelbase: 1400 mm / 57″
Dry Weight: 187 kg / 413 lbs
Top Speed: 121 km/h / 75 mph
Source: Sump Publishing


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