Yamaha - TX
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Yamaha D2-492-09-19
Photo ou archives : F-M. Dumas
919

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

YAMAHA

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.

SPECIFICATIONS

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.

 


Motorcycle encyclopedia Moto Passion, realised by François-Marie Dumas, include almost 2000 photos presented with an exhaustive history of the motorcycles exhibited.

This unique collection has been realised with the participation of many specialists. With many thanks in particular to Yves Campion, Michael Dregni, Didier Ganneau, Jean Goyard, Helmut Krackowizer, Michel Montange, Christian Rey, Bernard Salvat, Mick Woollett, etc

One can order here

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