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The Unapproachable Norton

Norton CS1 500cc

Norton CS1 1928

As did the majority of their contemporaries, Norton relied on the sidevalve engine until the introduction of its first overhead-valve design in 1922, the Model 18. This proved a very successful road machine.

Competition was a rather different story, as Velocette's OHC KTT had dominated the field in the 1926 Junior TT. Norton responded with a similar overhead camshaft engine the following year.

The Walter Moore engine proved an excellent design; it retained the Model 18's 79x100mm bore and stroke and employed bevel gears and a vertical shaft to drive the cams in similar fashion to the Velocette. The new machine sported a cradle frame and, for the first time, a saddle tank. At its first outing it secured a win in the 1927 Isle of Man Senior TT with Alec Bennett at the helm, finishing a full 8 minutes in front of the second place machine. Stanley Woods, also on a CS1, established a new lap record of 70.99 mph.

The production version of the new CS1 duly appeared at the Motor Cycle Show later that same year and continued as Norton's top-of-the-range sports machine until the introduction of the International.

This landmark sports model is regarded as one of the desirable Norton motorcycles by collectors.

Specifications
Production Years: 1927-1939

Power: 18.3 KW
Displacement: 490 cc
Type of engine: OHC Single
Transmission: chain
Maximum speed: 85mph (1928), 190 km/h (late models)
Weight: 145 Kg

Sources: Motos Antigua HD, et al


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