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The first Thruxton endurance event was a 9-hour race and took place in 1955, it was organized by the Southampton and District Motorcycle Club (SDMCC) and took place at the Thruxton Circuit near Andover in Hampshire, 2 more 9 hour races followed in 1956 and 1957.
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These earlier 9 hour races resulted in the birth of the famous Thruxton 500 miler, the first taking place in 1958 and the last in 1973.
The Thruxton 500 was an endurance race for production based road machines, covering 500 miles and ridden by a team of two riders per machine.
There were 12 Thruxton 500 events that took place between 1958 and 1973, during that period however were 4 races where the 500 miler had to be run at 2 different circuits because of poor track conditions at Thruxton. The first rearranged 500 miler race was at Castle Combe in 1965 followed by 3 other meetings but this time at Brands Hatch
In the 1960s the Thruxton 500 race was very important to British motorcycle manufacturers as it was a 500-mile (800 km) test of their bikes which provided public-exposure. A win, or second and third places in the Thruxton 500 offered advertising opportunities and boosted sales, resulting in keen competition around Thruxton’s fast, flowing and demanding track.
4 other endurance events were held at Thruxton but not under the Thruxton 500 name, 2 Powerbike Internationals in 1974 and 1975 and 2 Grand Prix D' Endurance events in 1976 and 1977.
7 other endurance events were organized by the SDMMC at different circuits around the UK.
Similar events were the Bemsee-organised Hutchinson 100 at Silverstone and the 'Motor Cycle' 500 at Brands Hatch in 1966 where Mike Hailwood demonstrated a Honda CB450 Black Bomber fitted with a sports fairing. It was unable to compete in the 500cc category, the FIM deeming it was not classified as a production machine as it had two overhead camshafts.
Only one motorcycle race a year is now held at Thruxton - a round of the British Superbike Championship
History
As with many World War II airfields, RAF Thruxton found a new role in the 1950s as a motorcycle racing circuit. Declared surplus to RAF requirements in 1946, the early track included both the runways and perimeter roads.
An application was made in 1949 by the Southampton and District Motorcycle Club (SDMCC) to the Auto Cycle Union for approval of the circuit for motorcycle racing, with the result that an official Track Inspection took place on New Year's Day 1950. It was attended by Syd Lawton, Arthur Wheeler, Cyril Quantrill and a number of members of the SDMCC. The Track Certificate was granted and the first Thruxton motorcycle event took place on Easter Monday 1950 and organised by the SDMCC.
The Bristol Motorcycle and Light Car Club organized a race event on 4 August 1952.
In 1953 the East/West runway was cut out and the Western part of the perimeter track was included and the direction was changed to clockwise.
In 1955 the SDMCC held their first motorcycle endurance race at the Thruxton Circuit near Andover in Hampshire, the start of a historic period for SDMCC.
The Clerk of the Course for this first endurance event was the late Neville Goss, the race was for 9 hours and the motorcycles were ridden by a team of two riders per machine. 2 more 9 hour races followed in 1956 and 1957.
9 Hour results.
1955. W.E. Dow, and E.B.Crooks on a 500 BSA at 67.71 mph.
1956. K.W. James and I.Lloyd on a 350 BSA at 72.3 mph.
1957. F.Weber and R. Avery on a 350 BSA at 67.0 mph.
No more 9 hour races, it’s now the start in 1958 of the famous Thruxton 500 races.
Motorcycle racing continued on the bumpy wartime tarmac (which was slowly breaking) until 1965, when plans were agreed for a new track. The new layout ignored the original runways and followed the perimeter road with an added chicane and three tight corners in succession (named Campbell, Cobb and Segrave) which became referred to as the complex. In 1968 the British Automobile Racing Club took over the track and the longer circuit was used.
Racing at Thruxton became famous for the endurance events for production motorcycles, and the Thruxton 500 in particular. The machines were supposed to be the same as could be bought, but most factories of the time invested in a racing team that invariably developed the motorcycles as much as possible.
The Triumph factory first showed their Thruxton Bonneville – a hand-built, extra-specification race-styled machine at the 1964 Earls Court Show, with very-limited production in 1965.
Triumph at Thruxton
The Triumph Thruxton 900 is a motorcycle made by Triumph Motorcycles Ltd. Launched in 2004, it was named after the Thruxton Circuit where Triumph won the first three places in 1969, establishing the "cafe racer" era where standard production motorcycles were modified to improve racing performance.
Nortons at Thruxton
In 1969 the Norton Motorcycle Company set up a development department at Thruxton circuit to support two racing Norton Commandos to represent the company in the Isle of Man TT races and the Thruxton 500. The Nortons achieved success over five seasons, during which time several improvements and modifications were developed.