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 DOT - 350 TT
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Photo ou archives : D. Fradin

Capacity : 350
Model : TT
Production : 1927 -
Category : (R) Racing


350 TT - 1927

Remarkable reliability

The name "Dot" was originally adopted in honor of a young lady named Dorothy. By the 1920s the marque was declaring that "DOT" stood for "Devoid of Trouble". Founded in 1903 by former racing cyclist Harry Reed, the company was little known until 1908, when Reed, riding a 680cc Dot powered by a 5hp Peugeot V-twin, won the Senior TT with just a spoonful of fuel left in his tank.

Racing Success

Racing Dots achieved many victories on the Brooklands circuit, first with Peugeot V-twin power, and subsequently with JAP engines. By 1923, Dot was offering an entirely JAP-powered range – 300 and 350cc singles and a 1000cc V-twin – then in mid-season added an oil-cooled 350cc Bradshaw engine to the line-up. Dot became the biggest customer for the "oil-boiler" Bradshaw, which remained in its catalogue until 1928.

Change of Policy

Harry Reed, having reached the age of 50, sold his company in 1926 to new owners and retired. The marque withdrew from racing and built only 350s – side-valve and overhead-valve JAPs and the unorthodox Bradshaw. Nevertheless, Dot was back in the TI in 1927 and 1928 with the brothers Ken and Eddie Twemlow, who finished second and third in the 1928 Lightweight. Eddie also came in third in the Junior, with a machine identical to that shown, one of only two built. Dot tried again in 1929, with a Guzzi-like horizontal JAP-engined single in a double-cradle frame, but without success.


Engine: 346cc (70x90mm) air-cooled JAP single-cylinder four-stroke; BTH magneto ignition; total loss lubrication with mechanical pump.

Valves: overhead

Fuel System: AMAC carburetor

Transmission: Sturmey Archer 3-speed hand shift, chain final drive

Suspension: girder forks (front); rigid (rear)

Brakes: 7 inch drum (front); drum (rear)

Wheels: 21 inch (front); 20 inch (rear)

Weight: 265 lb

Maximum Speed: 81 mph

This delightful Dot is one of just two 350s built for the 1928 junior TT, the marque's last successful entry in an event in which it had made its name 20 years earlier.

Le fichier Moto Passion réalisé par François-Marie Dumas réunit près de deux mille photos accompagnées d'un historique très complet des machines présentées.
Il sera progressivement mis à jour ici et toute information complémentaire est la bienvenue sur info@moto-collection.org.

Cette documentation unique, qui constitue sans doute l'encyclopédie la plus exhaustive jamais écrite sur l'histoire de la moto, a été réalisée avec l'assistance de nombreux spécialistes dont principalement Didier Ganneau, Christophe Gaime, Mick Woollett, Jean Goyard, Bernard Salvat, Christian Rey, Yves Campion, Helmut Krackowizer, Michael Dregni, Michel Montange, etc. que je remercie ici.

Disponible sur demande :
- Les fiches originales sur papier
- Les photos et archives signées de mon nom en haute définition ou les documents originaux.
Me contacter sur info@moto-collection.org pour les conditions et droits d'utilisation.