The Sunbeam Model 90 (1925) motorcycle has a single cylinder, side valve engine with a capacity of 499cc. It has a compression ratio of 5:1 and is air-cooled. The exhaust is single and it starts with a kick. It has a maximum power of 2.6 kW/3.5 hp and uses a chain for final drive. The frame is a single downtube cradle and it has Druid forks for the front suspension and a rigid, spring-loaded saddle for the rear suspension. The front and rear brakes are both drums and the wheels are made of steel with laced wire spokes. The dry weight of the motorcycle is 108 kg/238 lbs and has a top speed of 97 km/h/60 mph.
Technical specifications:
Make Model: Sunbeam Model 5
| Year | 1925 |
|---|---|
| Engine | Single cylinder, side valve |
| Capacity | 499 cc / 30.5 cu in |
| Bore x Stroke | 77 x 105.585 x 88 mm |
| Compression Ratio | 5:1 |
| Cooling System | Air cooled |
| Exhaust | Single |
| Starting | Kick |
| Max Power | 2.6 kW / 3.5 hp |
| Final Drive | Chain |
| Frame | Single downtube cradle |
| Front Suspension | Druid forks |
| Rear Suspension | Rigid, spring loaded saddle |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| Wheels | Steel, laced wire spokes |
| Dry Weight | 108 kg / 238 lbs |
| Top Speed | 97 km/h / 60 mph |
