High Quality Content by WIKIPEDIA articles! Ralph Rensen was a
former Grand Prix motorcycle road racer. He finished the 1961 Grand
Prix motorcycle racing season in sixth place in the 350cc world
championship. Rensen was killed June 16 1961 while competing in the
1961 Isle of Man TT, aged 28 years. Road Racing World Championship
Grand Prix is the premier championship of motorcycle road racing
currently divided into three distinct classes: 125cc, Moto2 and
MotoGP. The 125cc class use a two-stroke engine while Moto2 and
MotoGP uses four-stroke engines. In 2010 the 250cc was replaced by
the new Moto2 600cc four-stroke class. Grand Prix motorcycles are
purpose-built racing machines that are neither available for
purchase by the general public nor can be ridden legally on public
roads. This contrasts with the various production categories of
racing, such as the Superbike World Championship, that feature
modified versions of road-going motorcycles available to the
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