The Norton International Model 30 is a four-stroke, single cylinder, SOHC motorcycle with a capacity of 490.1 cc/29.9 cu in. It has a cooling system of air cooled with a compression ratio of 7.23:1. The PAzin Amal TT carburetors fuel the engine while the Lucas dynamo controls the ignition. It uses a kick starter to start and has a maximum power of 22 kW/29.5 hp at 5500 rpm. It has a 4-speed, close ratio transmission with a final drive of a chain with gear ratios of 1st 10.8/2nd 6.18/3rd 5.1/4th 4.64:1. The frame is a cradle type with a front suspension of a road holder telescopic fork and an undamped plunger for the rear suspension. Both the front and rear brakes are drums with steel laced wire-spoke wheels. It has a front rim of 3.00 x 21″ and a rear rim of 3.50 x 20″. The wheelbase is 1410mm/55.5 in and it has a dry weight of 176 kg/390 lbs. It can reach a top speed of 156 km/h/97 mph.
Technical specifications:
Make Model: Norton International Model 30
| Year | 1955 |
|---|---|
| Engine | Four stroke, single cylinder, SOHC |
| Capacity | 490.1 cc / 29.9 cu in |
| Bore x Stroke | 79 x 100 mm |
| Cooling System | Air cooled |
| Compression Ratio | 7.23:1 |
| Induction | PAzin Amal TT carburetors |
| Ignition | Lucas dynamo |
| Starting | Kick |
| Max Power | 22 kW / 29.5 hp @ 5500 rpm |
| Transmission | 4-Speed, close ratio |
| Final Drive | Chain |
| Gear Ratios | 1st 10.8 / 2nd 6.18 / 3rd 5.1 / 4th 4.64:1 |
| Frame | Cradle type |
| Front Suspension | Roadholder telescopic fork |
| Rear Suspension | Undamped plungers |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| Wheels | Steel, laced wire spokes |
| Front Rim | 3.00 x 21″ |
| Rear Rim | 3.50 x 20″ |
| Wheelbase | 1410 mm / 55.5 in |
| Dry Weight | 176 kg / 390 lbs |
| Top Speed | 156 km/h / 97 mph |
