Lot 003: SPARTON-SUZUKI 500

Sparton frames were manufactured by Barry Hart together with other racing related accessories. Early versions were built to house Yamaha 125cc twins and he was also responsible for triples 350 and 500cc triples built using TZ top ends. However,Sparton are probably best known for their RG500 powered machines, one of which would find fame as the "Silver Dream Racer" built for the film featuring David Essex in 1979. Of more significance competitively was the one two finish achieved by a pair of Sparton machines at the North West 200 in 1976. The RG500 over the counter racer was introduced for the 1976 season,essentially replicating the works four cylinder machines first campaigned by Suzuki in the 1974 season. The new machine was responsible for rejuvenating the 500cc class at all levels, which until its introduction had struggled for entries due to the disparity between the works machines and those available to privateers. Equipped with a disc valve, two stroke engine which featured independent cranks, barrels and heads and a six speed gearbox it offered privateers a power output of approximately 103bhp in it's original over square configuration, enabling them to maintain a pace that at times matched the factory bikes. It was felt by some, though, that the standard steel frame could be improved upon, providing an opportunity for specialist manufacturers such as Sparton with their ability to produce fine handling frames. The machine offered, which features a steel frame, alloy spoked wheels and attractive white bodywork, bears the frame number 001, and is according to the vendor, the first Sparton built to house a RG500 square four two stroke. It is also, according to the vendor, the fastest British built 500 to lap the TT circuit.