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 Yamaha - 750 TX
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Photo ou archives : F-M. Dumas

Capacity : 750
Model : TX
Production : 1972 - 1974
Category : (R) Street Bike


TX750 ·1972

A new breed of twin

At the beginning of the Seventies, Honda was still market leader by a considerable margin, despite the astounding rise of Yamaha, whose very sporty 250 and 350cc twincylinder two-strokes seemed to be everywhere.

Two-Stroke, Four-Stroke or Rotary?

In 1970 Yamaha only had one four-stroke the XS650 twin-cylinder - in its catalogue. Anxious to join the exclusive coterie of companies making "big bangers" as a full member with an original turn of mind, Yamaha revealed the depth of its ambition and its uncertainty over which direction to take - by unveiling some quite remarkable prototypes. These included the 1971 GL750, a fuel-injected four-cylinder two-stroke with liquid cooling, and the rotary-engined RZ201 unveiled in 1972.

Supplanting the British Twins

But ultimately Yamaha chose to follow an entirely different path and in 1972 put its first large modern four-stroke, the TX750, on the market. Compared witt, the sporting Kawasaki 900 Z1 which went on sale in 1973, Yamaha had taken a very cautious route, with a twin-cylinder four-stroke grand tourer intended to pick up the torch dropped by the British vertical twins. There was one major difference: the inherent vibrations of a 360 degree parallel twin were eliminated by chain-driven balance shafts. It was a sound idea and it was widely accepted. Unfortunately, the TX suffered from a number of major problems: it broke easily and overheated too often.


Engine: air-cooled 743cc (80x74mm ) 360 degree parallel twin with balance shafts

Power Rating: 63hp @ 6500rpm

Valves: overhead

Fuel System: 2 Mikuni-Solex carburetors

Transmission: 5 speeds; chain

Suspension: telescopic forks (front); swinging fork (rear)

Brakes: disk/drum

Wheels: (front) 19in; (rear) 18in

Weight: 485 lb

Maximum Speed: 121 mph


Elegantly rounded, this 1972 TX bas been fitted with an oil-cooler to improve its reliability.


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.