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 Velocette - 350 KTT Mk I
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Photo ou archives : F-M. Dumas

Capacity : 350
Model : KTT Mk I
Production : 1929 -
Category : (R) Racing


350 KTT Mk I -1929

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In 1926, riding a works Velocette, Alec Bennett won a resounding victory in the Tourist Trophy, beating the next man home by several minutes. He was defeated by an HRD in the 1927 Junior TT, but the marque won the two following years, 1928 and 1929.

Best Foot Forward

Flushed with success, Velocette tried a number of innovations in 1928, of which the most notable was a foot-operated gear selector in place of the traditional hand lever on the side of the fuel tank. It was copied by every manufacturer worldwide. Another revolutionary feature was the swing ann rear suspension. Velocette used a complex system with a friction-damped pivoting rear-frame triangle acting on twin springs beneath the saddle through the medium of bellcranks. Tricky roadholding and a substantially reduced ground clearance insured that this suspension - too far ahead of its time - was never raced.

The First Clubman Racer

Swing arm rear suspension did not reappear on a racing "Velo" until the Mk VIII KTT of 1939. In 1929, Velocette announced the KTT Mk I, a replica of the victorious TT machine. It was the first true "client-competition" and remained the favorite mount of clubman racers right up to the immediate postwar period. In the 1930 Manx TT, restricted to amateur riders, KTT Velos took the frrst eight places! This overhead-cam single had the trend-setting foot gearshift and its roadholding was remarkable for the period. On a gasoline/benzol mix, it reached 100 mph.


Engine: 34&c (74x81mm) air-cooled singlecylinder four-stroke; ML racing magneto

Valves: shaft-driven overhead-camshaft

Fuel System: Amac carburetor

Transmission: 3-speed foot-shift, chain final drive

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

Brakes: drum (front & rear)

Wheels: 21 inch wire (front & rear)

Weight: 265 lb

Maximum Speed: 85 mph (gasoline); 100 mph (alcohol)


This K1T Mk I is a rare survivor of the 178 examples of this model built during 1929.


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.