it seems surprising that the G50 did not come
into being before 1958. Although clearly derived
from the AJS 7R, AMC were committed to the development
of the G45 twin and did not wish to divert their
attention from that project. As a result it
was not until 1958 that a 500cc motorcycle derived
from the 7R appeared largely as result of the
7R's proponent at boardroom level, Jock West.
The new machine shared the 7R's 78mm bore with
a stroke of 90mm giving a capacity of 496cc.
The prototype engine underwent a period of intensive
development throughout 1958 to prepare it for
production commencing in 1959.
When the new model
was released the engine, although visually the
same as the 7R had its own dedicated castings.
A power output of 51bhp at 7200rpm was claimed
for the new model.
The cycle parts followed the same pattern as
those used by the contemporary 7R with only
the difference in colour and badge to distinguish
between them, a fact that has led to numerous
arguments between enthusiasts ever since as
to which is the most attractive, the 7R or G50!
In more recent years new machines built to compete
in classic events.
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