Frith entered his first major race, the first Manx Grand Prix in 1930 riding an over-the counter, 350 cc Velocette KTT in the Junior event, finishing third at a speed of 60.34 mph. He retired from the 500 cc race with a blown engine, again riding his 350, when holding third place.[7]
He won the 1935 Junior Manx Grand Prix and then joined the Norton team for the 1936 TT Races. It was a winning combination as he claimed the Junior TT and finished second in the Senior TT as well as winning the 350cc European Championship. In 1937 he went one better in the Senior and took a brilliant win and setting the first 90 mph plus lap of the Snaefell Mountain Course.
After finishing third in the 1939 Senior he missed the 1947 TT due to a practice spill on a 500cc Moto Guzzi. Turning to Velocettes in 1948 he won the Junior Race, repeating this success a year later. Freddie was the first ever 350cc World Champion in 1949, winning all five events of the inaugural campaign, using a single-overhead-camshaft engine in the Ulster race.
Frith, alongside other riders from BSA, Ariel and Matchless works teams, served in the army during World War 2 at the Infantry Driving & Maintenance School stationed at Keswick, where officers and NCOs learned how to ride cross-country. Sgt. Freddie Frith taught teams of four on Norton 500s over Skiddaw in all weathers. A special treat on the last day was reserved for roadwork, following Frith's track-style fast cornering.
^Motorcycle Sport, UK monthly magazine, August 1978, p.296 Freddie Frith Limited, official advert. The latest and greatest shaft drive motorcycles from Honda & BMW. 119 Victoria Street Grimsby. Accessed 17 June 2015
^Keig, Stanley Robertson (1975). The Keig Collection: six hundred photographs from the Manx House of Keig of T.T. riders and their machines from 1911 to 1939, vol 1. Bruce Main-Smith & Co.pp.28-29 ISBN0-904365-05-0
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