Yamaha R1 2002



Year 2002,change of direction in Yamaha’s home. Radically changes the dynamics of his bike more sporty and responsiveness of the proverbial YZF R1 gives way to more stable first prerogative of cousins โ€‹โ€‹of course in handling losing, but gaining in strength in front.

The new frame (Deltabox III) stiffer, the suspension has a diameter larger (41 against 43), new brakes, new fork all designed to improve the dynamics of a movement already at the top, all designed as a function of reduced psycho-physical stress. The R1 carbs was famous for being surly, and the passage around 6500 rpm (in extreme driving on the track) could not embarrass a few people harnessed bull by the horns, an animal of that breed would be treated as such, with due prudence, with the proper awe.

But now something has changed the engine has benefited from the new power supply system, the transition to electronic instead of carburetors won a regular basis, clean dispensing hardly desirable at the design stage, considered the first experience of the technicians Yamaha in a production bike.

And instead of 0 to 12,000 rpm indicated, the bike shows a linearity that at first puzzling, and not experiencing the classic “kick in the pants” that you would expect, as you may think that the “couple” does not come ever and instead there is all, and in abundance.


The cavalry released from the renovated 4-cylinder Iwata shows especially urgent in the first 3 gears, which shows a tendency to lose contact with the ground in the solid front axle and quiet (so to speak) just by entering the 4th report, which leads quickly to put the gears one by one until the approach of the maximum speed. At this juncture there is a little note due to the choice of gear ratios seem correct except for the last march, which has been slow to reach the red zone of the tachometer. Perhaps there is to “blame” the very small wind protection, “maybe” not just my jockey tonnage.

Fact Sheet
Particularly interesting is the power supply system, with which the Yamaha finally went from carburetors to electronic. According to the Yamaha engineers, the pattern used is quite sophisticated, and combines the advantages of the injection itself with those of depression carburettors.

The electronic unit is flanked by several sensors that detect the ambient pressure and the air-box, water temperature and intake air, the speed, the valve opening, the position of the cranks’ crankshaft and the composition of exhaust gases. As regards the rules on emissions of pollutants, the R1 is within the limits of the law Euro-2, as shown by the (generously sized) three-way catalysts.

Quadricilindrico in line four stroke, transverse, water cooled. Double overhead camshafts in the head with five valves per cylinder. Bore and stroke 74.0 x58, 0 mm. 997.797 Displacement cc Compression ratio 11,8:1. Electronic fuel injection. Digital electronic ignition. Forced lubrication, wet sump.

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