Sunbeam Model 90 (1928-33)
Comparison technical specifications
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| Make: | Sunbeam |
| Model: | Model 90 |
| Years: | 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 |