Perhaps the most popular sports model on the road, Nortons bid fair to retain their popularity. The greatest interest will be aroused in the overhead camshaft engine, which will probably be the most coveted machine in 1928. This model known as C.S.1. represents an embodiment of racing practice in road use.
New cradle frames with torque rods are fitted to the T.T. models - both push rod and camshaft - and should prove as stable in private hands as they have in racing, at the terrific speeds of which these engines are capable. 95-100 m.p.h. is mentioned in connection with the latter.
CS1 500cc OHC
Designed by Walter Moore, it had the same bore/stroke ratio as the Model 18 - 79x100mm - and used bevel gears on a vertical shaft to drive the overhead camshaft.
Having won the 1927 Isle of Man Senior TT, the production version of the CS1 was revealed at the Motor Cycle Show late in 1927. It continued as Norton's primary sports machine until the introduction of the International.
Norton Model 18
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