Test Yamaha YZF-R1 2009: Road... with the motor of the dreams

The R1 2009 bursts into the segment of the supersporting ones with the first great technical change introduced into the scheme of the motor four cylinders in line: the irregular bursts. Sound and disbursement bicylindrical but performance and I lengthen four cylinders, they unite with a control of the gas and of the back wheel I never endorse before hour.

Forget the hissing sound of four cylinders in line known till now. Those roared unloadings that were resounding to the high and low regimes as flutes driven to the high frequencies are only a memory. New Yamaha R1 ‘09 converges on the road of the modern MotoGP and goes along again the most evident technical choices, like the motor it to irregular bursts that transforms in so evident way the typical unloading sonority.


The motor is hoarse also when one travels above 10.000 indicated circles / minute, while at least there is added to the big and thundered voice an evident irregularity of typical answer of the bicylindrical big ones of our house. But the future seems by now unequivocally outlined and that one from the motor to irregular bursts becomes the technical choice of reference that we cannot marry and subscribe already after few circles on the traced out historian of Eastern Creek, to few tens of kilometres of Sidney, in Australia.

Even if with less authoritative and more human garments compared to those of expensive Valentino, also we have to convince the most efficient management of the power presented by this type of motor. Not at random his majesty Red, after the first time had tried it, opted undergone for the motor to irregular bursts instead of that to agreed bursts, then called "screamer", that was guaranteeing nevertheless a quite superior maximum power. If then the benefit, in traction terms and dosabilità of the gas, is informed by a world pilot who certainly is not deficient in sensitiveness of guide and control of the motion, an even greater benefit will be informed by how many like us, honest workers of the semihandles, we have not at ours a noble cotanto movement of the “right wrist”.

Aerodynamics and style
One of the most evident changes of the news YZF-R1 is the completely drawn again small dome, which adapts perfectly to the double lighthouse with supplemented air catching. The unmistakable look of the series R is easily recognizable, but on this last version it is exasperated by a line extremely sharp that cleaves the air.To the lighting of the anabbaglianti a device is activated which dark part of the lighthouses.

When the pilot selects the dazzling ones it is withdrawn, allowing the complete projection of the bright bundle. The innovative design of the projectors includes also the commutator abbaglianti/anabbaglianti to solenoid, used for the first time on one motion destined for the series production. Also the instrumentation has been renewed: the new display multifunction is provided with tachometre, speedometer, thermometer of the liquid of cooling, indicator temperature aspirated air, two partial speedometers, indicator I level fuel, watch, chronometre, indicator of changed, indicator inserted march and indicator map motor activates. A novelty of the model 2009 is the loom of red, disposable colour only for the YZF-R1 "white", that confers to the motion a single look, emphasising so the new design.

Technology concentrate

The most significant technological element of this new compact motor to high performances is the tree “to cross” of derivation racing, that guarantees an exceptionally linear couple and gestibile and elevated traction levels. When a motor produces a determinate couple, in fact it develops this that the engineers Yamaha define “composite couple”, or a combination between that one produced by the combustion and that inertial resultant the rotation of the drive shaft.

In spite of the level of couple generated by the combustion there is proportional as well as direct result of the order given by the pilot on the accelerator, the inertial couple is instead of fruit of the variations produced by the rotation of the motor on the strength of inertia (resistance of the drive shaft to the rotation). Therefore the factor of the composite couple is not directly and immediately checkable by the pilot, in all that he varies while varying of the regime motor, independently the order given on the accelerator.

To be able to offer a more linear control it is then necessary to create a motor that allows to minimise the inertial couple and to optimise that one composite. In 4 cylinders one of the most effective manners to do it consists in adopting a tree “to cross”, with the connecting rod axes arranged in the way of obtaining intervals of lighting of 270th, 180th, 90th, 180th one, completely diverged compared to the sequence 180th, 180th, 180th, 180th from a traditional motor to 4 cylinders. This geometry allows to minimise the inertial couple created by the masses in alternate movement and to obtain the perfect push to the low and middle regimes and an excellent linearity of disbursement to any regime.

And in order to optimise later on the forces of combustion of the new asymmetrical motor, the electronic mapping of the system of alimentation foresees an injection of the fuel and a phasing of the lighting distinguished for each cylinder. Besides the pin of the drive shaft is of increased diameter, equal to 36 mm (compared to the 32 mm of diameter of the model YZF-R1 2008), fitter for the new characteristics of the tree to cross. The characteristic shares of the motor are of 78,0 x 52,2 mm, with a scheme to short run that determines the most elevated bore never recorded on a supersporting motor Yamaha with 1.000 cc.

It makes the debut on this one a motion also the substation with system “D-Fashions“ that foresees three different manner for the mapping of the motor: Standard, To and B, selezionabili the pilot on the grounds of the conditions of guide through the special order on the right semihandle. The Standard manner is going mappata to offer optimal total performances, the manner A guarantees an answer readier of the motor, while the B supplies a sweeter feedback to the orders given by the pilot on the accelerator.

This version 2009 is a compendium of all most sophisticated systems of electronic management planned at Yamaha's, the order of the gas is present in fact at electronic control YCC-T (Yamaha Chip-Controlled Throttle), the system of electronic injection with secondary injectors, the valve parzializzatrice at the unloading Exup and the system that varies the length of the ducts of inhalation YCC-I (Yamaha Chip-Controlled Intake) to optimise the respiration of the motor to different rotation regimes. Pistons close to spindles, connecting rods cemented and new water-supplies of the liquid of cooling provided with floating soul, complete the technical picture of this news, fascinating R1 2009.