Sunbeam Model 90 (1928-33)

Make Model: Sunbeam Model 90


Year: 1928 – 33
Engine: Single cylinder, four stroke, SOHV
Capacity: 493 cc / 30.1 cu in
Bore x Stroke: 80 x 98 mm
Compression Ratio: 7.0:1 (Optional 7.5 or 9.0:1)
Cooling System: Air cooled
Exhaust: Twin
Lubrication: Wet sump
Starting: Kick
Ttansmission: Three-speed with handshift meganism, medium ratio (BT) or close ratio (CT)
Final Drive: Chain
Gear Ratios: BT: 1st 10.3 / 2nd 6.9 / 3rd 4.6:1 CT: 1st: 8.4 / 2nd 6.2 / 3rd 4.6:1
Frame: Single cradle, steel
Front Suspension: Druid-pattern, girder forks
Rear Suspension: Rigid, spring loaded saddle
Front Brakes: Drum
Rear Brakes: Drum
Wheels: Steel, laced wire spokes
Tyres, Front and Rear: 3.25 x 26″ Dunlop Racing option: 2.75 x 27″
Dimensions: Length: 2083 mm / 82″ Width: 889 mm / 35″
Wheelbase: 1359 mm / 53.5″

Saddle Height: 711 mm / 28″
Dry Weight: 143 kg / 315 lbs Racing: 141.5 / 312 lbd
Fuel Capacity: 11.4 L / 2.5 Imp gal / 3.0 US gal
Oil Capacity: 2.8 L / 5.0 Imp pt / 6.0 US pt
Top Speed: 145 km/h / 90 mph


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