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Norton 500 1930
1930 NORTON 500. Nortons have contested every Senior T.T. But it was not until their redesigned camshaft motor was introduced in T93° tnat tnev achieved all-conquering power. True, in 1930 the machine design was too "new" to win. But then it won in 1931, '32, '33, '34, '36, '37> '38 and again after the war in 1947, '48, '49, '50, '51, '52, '53, '54, '61—sixteen victories on what was virtually one engine design, steadily developed.
From their Vee-twin of 1907 Nortons went to a 79x100 mm.
side-valve single before World War One. After the war this model was fitted with
three speeds and chain drive and then, later, with push-rod o.h.v. In the o.h.v.
form it won in 1924 and 1926.
The 1930 Norton looked like a winner; its very lines suggested speed. The frame was a sturdy cradle type with three tubes running from each side of the rear wheel spindle to give great torsional strength. In fact the xame was exceptionally like the one introduced a few years earlier by eorge Brough—one which had proved capable of holding a beefy ,000 c.c. motor on a path considerably straighter than its rivals.
The basic Norton design, that was to remain unchanged for so
long, included a very sturdy crankcase and through-bolts to hold down head and
barrel. Whereas on the old camshaft job the magneto had been driven from a chain
on the drive side, now a separate mag chain was fitted in a case outboard of the
bottom bevel box. Oldham couplings were used on the vertical drive shaft in
place of the splines of the '27 motor. (Design later went the full circle in the
late fifties.) Lubrication was on the dry sump system. Coil valve springs were