The CS1 (Camshaft Senior 1) was Norton’s very first overhead cam engine. Introduced for the TT in 1927 they went on sale to the public later that year as race replicas. They continued in this guise, along with the 350cc CJ1 (Camshaft Junior 1) for a couple of years before its designer, Walter Moore, left Norton to go to NSU in 1929 and took the design with him as he owned the patent himself.
As a result Norton brought in engineer Arthur Carroll in and tasked him with a complete redesign, thus the International was born, this turned into the Manx after the war and became the very successful racing bike we all know.
The CS1 won its first race won the IOM Senior TT in 1927 and Stanley Woods set the fastest lap at 70.99 mph before retiring. With a reputed top speed of 85 mph the bikes went on to have many other racing success as wells becoming an extremely popular ‘Replica TT’ road bike. Coming from a discerning collection of Nortons this example have been well looked after and is in fine running order, a highly prized and collectable motorcycle with remarkable performance.