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Yamaha FZ750

Yamaha FZ750

Ground-breaking Genesis In the mid-1980s no other motorcycle was as technologically ground-breaking as the Yamaha FZ750.

In fact, so many of the innovations that began with the FZ750 can still be found in Yamaha's sports flagship YZF-R1 twenty years later. At the time Yamaha had been known for producing exciting two-stroke machines for the sports market, while it's large-capacity four-strokes were seen as more 'traditional' sports-touring machines.

The FZ750 was to change all that. Yamaha engineers were told to build a four-stroke machine for the street, which could be used as a base for four-stroke racing. Firstly, engineers wanted a motor for the new bike which could produce enough power. To do this they used two innovative measures. Firstly, to get the maximum amount of air into the combustion chamber, engineers made the route from the intake manifold to the four inline cylinders as straight as possible, tilting the engine block forwards by 45 degrees to help do so. Secondly, to get the optimal flow of fuel and air into the combustion chamber, the engineers chose a layout which used three intake and two exhaust valves. Liquid-cooling was also used to help keep engine temperatures down and outright power up.

Coupled with excellent front and rear weight bias and low centre of gravity, the result was a superb all-round machine, with a class-leading power output and a bike which on the street and in the 'real' world was much more flexible than its rivals.

Concepts such as five-valves per cylinder, liquid-cooling and the slanted forward engine were so correct that they're still used in the R1 and other modern bikes today.

Twenty years after its first launch, the FZ750 Genesis is still universally popular. Many riders around the world still enjoy the performance, practicality and proven reliability of the FZ.

1985 Yamaha FZ750 general specifications;

  • Dry weight kg: 224
  • Overall length mm: 2225mm
  • Wheelbase mm: 1485
  • Cylinder arrangement: 20 valve, liquid-cooled inline four
  • Bore & stroke: 68 mm x 51.6 mm
  • Displacement cc: 749
  • Compression ratio: NA
  • Maximum horsepower rpm: 100 @ 10500 rpm
  • Transmission: 6 speed
  • Front suspension: Hydraulic fork
  • Rear suspension: Rising-rate monoshock
  • Front tyre: 120/80-16
  • Rear tyre: 130/80-18