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 Velocette - 350 KTT Mk 7 TT '38
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Photo ou archives : F-M. Dumas

Capacity : 350
Model : KTT Mk 7 TT '38
Production : 1938 -
Category : (R) Racing


350 KTT MK7-1938

The privateers' favorite

Despite the success of the works Manx Nortons, the most popular of the classic British singles among privateers was the Velocette KTI, which won the coveted Senior TT title in 1926-28-29-38-39 and later in 1947-48-49.

Enclosed Valve Gear

Designed in 1924, the KTT possessed an overhead camshaft driven by shaft and bevel gearing. Its mechanism was, nevertheless, relatively quiet. It was endowed with a light alloy cylinder head in the late 1930s. Generously finned , its valves and rockers were totally enclosed, a feature notably still lacking on contemporary Nortons.

First Major Success

After two years' development, the KTT had its ftrst major success at the 1926 Isle of Man Tourist Trophy meeting in which it won the 350cc Junior race, beating the hitherto unassailable AJS Big Port. At the end of 1928, the KTT was the first machine to adopt a footoperated gear selector and abdicate its status as a works machine in favor of a new role as an over-the-counter racer for privateers. It was also available in roadgoing form as the KSS (Sport Roadster). The seventh incarnation of the KTI, unveiled in 1937, had the new aluminum cylinder head with enclosed rockers, though it retained the rigid frame of its predecessors. It was not until the following year that Velocette made the great leap forward and adopted swinging fork rear suspension - fitted to the works racer of Stanley Woods since 1936 - on the Mk 8 production version of the KTT.


Englne: 348cc (74x81mm) air-cooled singlecylinder four-stroke

Power Rating: 27 hp @ 6500 rpm

Valves: shaft-driven overhead camshaft

Fuel System: Amal racing carburetor

Transmission: 4-speed, chain fmal drive

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

Brakes: drum (front & rear)

Wheels: wire; 3.00x21 (front); 3.50x19 (rear)

Weight: 298 lb

Maximum Speed: over 100 mph


This KTT- ridden in the illustration by Cecil Sandford, 1952 125cc and 1957 250cc world champion finished ninth in the 1938 junior TT ridden by the Frenchman Roger Loyer.

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.