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Norton Dirt Track 1930 Con el auge del Speedway fueron varias las fábricas británicas que se interesaron en presentar un modelo para esta especialidad. Norton intentó comercializar en 1930 el modelo DT (Dirt Track) para carreras en circuitos de tierra usando una versión del motor ES2 con balancines modificados, pistón de aluminio para una relación de compresión 10,5:1, bomba de lubricación mecánica Best & Lloyd mas una auxiliar manual, magneto Lucas Racing y carburador Amal de doble cuba. Lo distintivo del motor DT era que la cubierta de la cadena del magneto era más de una pulgada más corta que la del modelo estándar.
La caja de velocidades era Sturmey Archer, la horquilla delantera era una Webb modelo Speedway y el cuadro era tipo diamante modificado. Como es de esperar con las máquinas Dirt Track, la mayoría de los modelos DT de producción se suministraron sin frenos, pero algunos se vieron equipados únicamente con un freno trasero.
Según los registros de fábrica se produjeron treinta y seis Norton DT en un único año: 1930 puesto que, lamentablemente para Norton, un tal J.A.Prestwich de Tottenham había lanzado casi en simultáneo su legendario motor JAP Speedway que se convertiría en el motor elegido por la mayoría de los corredores de velocidad.
With the rise of Speedway there were several British factories that were interested in presenting a model for this specialty. In 1930 Norton entered the market with the DT (Dirt Track) model for long and short track racing using a version of the ES2 engine with modified rockers, aluminum piston with a compression ratio 10,5: 1, mechanical Best & Lloyd oil pump with manual auxiliary, Lucas Racing magneto and Amal dual-throat carburetor. The distinctive feature of the DT engine was that the magneto chain cover was more than an inch shorter than the standard model.
The gearbox was Sturmey Archer, the front fork was a Webb Speedway model and the frame was modified diamond type. As expected with the Dirt Track machines, most DT production models were supplied without brakes, but some were equipped with a rear brake.
According to factory records there were thirty-six Norton DT machines built in 1930. Unfortunately for Norton, a certain J.A. Prestwich of Tottenham had launched almost simultaneously the now legendary JAP speedway engine which would become the engine chosen by most of the speed merchants.
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See also: Norton Speedway Motorcycle
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