Norton International (1955)

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