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TT-raced OK Supreme up for auction

A 1935 OK Supreme TT bike will be sold by H&H Classics at the National Motorcycle Museum on 30 July for an estimate of £6000 – £8000.

This RC37 250cc was much modified by the owner Henry Harrison from Liverpool after the Second World War. He fitted a rear swinging arm along with AMC suspension and then entered the 1951 Isle of Man TT. Harrison finished 14th in the lightweight class, averaging 60mph.

In 1952 he entered again, this time finishing 22nd with an average speed of 66mph. H&H says these two results were quite a feat considering the bike was more than 17 years old at the time.

Subsequently modified after the TT races with Velocette front suspension, it was then raced successfully up to 1958 on short circuits including the Ulster GP.

The bike was bought from Henry Harrison by the current vendor in 1959 and lay unused before being restored to its current state in the 1980s and displayed at various local Liverpool bike shows up until the 1990s.



Henry Harrison prepares to race his OK Supreme at the TT in 1952




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