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THE NEW 2009 model
YZF-R1 represents the most significant development in engine and chassis technology ever seen in the 11-year history of this legendary motorcycle.
Featuring an all-new 998cc engine whose design, feel and character has been influenced by our championship winning M1, the new high-tech R1 powerplant is closely linked to our MotoGP bike. Indeed, in its long and illustrious history, the R1 engine has never benefited from so much MotoGP developed technology as the 2009 model.
In addition, the completely redesigned aluminium Deltabox chassis and aggressive new styling, give the new-generation YZF-R1 a radical new look and bring innovative technology to the class. In the same way that the original YZF-R1 threw the rule book out of the window, this revolutionary new model sets a new benchmark for the super-competitive 1,000cc supersport category.
The defining and most influential feature of the new YZF-R1 is the use of an innovative new 998cc engine which has been developed from our winning YZR-M1 MotoGP design. Undoubtedly the single most significant piece of technology to be seen on this compact new high-performance engine is its race-developed crossplane crankshaft, which delivers outstandingly pure torque characteristics and high levels of traction. Indeed, the new engine's linear and controllable torque characteristics are the very essence of this radical new generation YZF-R1.
Uneven firing interval for new levels of feel and traction The new engine's uneven 270° - 180° - 90° - 180° firing interval creates a whole new feel to the inline 4-cylinder engine, giving the new YZF-R1 rider a more precise and immediate feeling of control over the torque output levels. In addition, the new engine's linear torque delivery gives rise to a confidence-inspiring sensation that makes each throttle input, however subtle, feel as though it is transmitted directly to the rear tyre.
The result of this rider-responsive torque is an enormously capable 1,000cc supersport motorcycle that is designed to deliver previously unattainable levels of traction for unrivalled cornering performance.
To accentuate the performance gains of the new crossplane crankshaft engine, we have also developed a new short-wheelbase aluminium Deltabox chassis and optimized the front and rear suspension systems. And the radical and aggressive new styling emphasises the new YZF-R1's concentration of mass and dense compactness.
Engine
Newly-designed inline 4-cylinder engine with crossplane crankshaft This remarkable new 998cc liquid-cooled inline 4-cylinder 4-valve engine features bore x stroke dimensions of 78.0 mm x 52.2 mm, giving an extremely short stroke layout, together with the largest bore dimensions ever used on a Yamaha 1,000cc supersport engine. In association with the short stroke and big bore, a high compression ratio of 12.7:1 is featured, which contributes to the new engine's impressive power output of 133.9 kW (182 PS) at 12,500 rpm, and a torque output of 115.5 Nm (11.8 kg-m) at 10,000 rpm with natural aspiration.
The new engine's linear power characteristics deliver a 1:1 relationship between the rider's throttle input and the engine's output to the rear tyre, and it is this crucial aspect of the new bike's character that allows the rider to experience a new of level of cornering performance, together with outstanding traction when entering the mid-section of a corner, and also when accelerating out of a bend.
Although the level of combustion torque is both proportionate to, and also a direct result of the rider's throttle input, the inertial torque is produced in direct relation to the changes in inertial force caused by the engine's revolutions - and so this element of the composite torque is not under the direct and immediate control of the rider. The composite torque level varies throughout the engine's rpm range, regardless of the rider's throttle input, and the unpredictable nature of this composite torque means that the rider cannot select precisely and immediately the torque level that they desire at any given moment.
Uneven 270º - 180º - 90º - 180º firing interval One of the most effective means of achieving optimal composite torque in a 4-cylinder engine is the adoption of a crossplane crankshaft with the crankpins positioned to give a firing interval of 270º - 180º - 90º - 180º, as opposed to the 180º - 180º - 180º - 180º firing interval of a conventional 4-cylinder engine.
So, while a conventional 4-cylinder engine sees the four pistons and con rods effectively move up and down in the cylinders as two pairs (i.e. on the 2008 YZF-R1 the two outermost pistons and con rods move together, as do the two innermost pistons and con rods), each piston and con rod in the new crossplane crankshaft has its own individual and separate movement. The result is that the inertial torque created by the reciprocating mass in the new YZF-R1 engine is minimized, while the asymmetric firing sequence achieves a strong pulse at low to mid rpm range, together with excellent linearity across the whole rpm range.
Newly-developed forged aluminium pistons
The new YZF-R1 is equipped with lightweight forged aluminium pistons which have been manufactured using the same process as the 2008 YZF-R1. During the special forging process, the aluminium alloy is not actually melted, but is only heated to the temperature where it can be shaped under pressure in the forge. This system allows the aluminium to retain more of the original strength of the metallurgic matrix, which enables our engineers to specify a lighter piston design, thereby reducing reciprocating weight and enhancing throttle response.
Closed-deck ceramic-composite plated cylinder
The new lightweight ceramic-composite plated cylinder provides excellent heat dissipation together with an outstanding rigidity balance. This new short-stroke cylinder features a closed-deck design in which the coolant passages do not pass from the cylinder into the cylinder head, and this makes for high levels of reliability in this type of high compression inline 4-cylinder engine. The new short-stroke engine also benefits from shorter cylinder stud bolts which gives a weight reduction, and at the same time helps reduce overall engine height to give compact overall dimensions.
Fracture split (FS) carburized con rods
The new 2009 model YZF-R1 is equipped with fracture-split (FS) carburized con rods, a system that has been used successfully by Yamaha since the 2004 model YZF-R1. The two halves of each fracture-spit big end ring are re-assembled along the same fracture lines, and this makes for a stronger and more perfectly round big end, giving outstanding performance and reliability.
Optimised large-diameter crank journal and flywheel mass
The all-new YZF-R1 engine design is equipped with a larger 36 mm crank journal (compared to 32 mm diameter on the 2008 model YZF-R1) which is designed to handle the new power and torque characteristics of the crossplane crankshaft.
YCC-I (Yamaha Chip Controlled Intake)
The YCC-I system features electronically-controlled intake funnels whose length can be varied to suit the prevailing engine speed in order to provide good intake pulsation.
At low to mid engine speeds the long and short funnels operate as a single connected unit, but when the engine speed exceeds 9,400 rpm the YCC-I on the new YZF-R1 engine automatically separates the lower funnel and upper funnel by means of an electronically-controlled servomotor. By varying intake length to suit engine rpm, the YCC-I system enables the new YZF-R1 engine to operate more effectively across the rpm band, and the funnel separation process is so smooth that the rider is unaware it has happened.
YCC-T (Yamaha Chip Controlled Throttle)
The advanced YCC-T electronic throttle system delivers outstanding controllability at all speeds, and helps to prevent any hesitation caused by an excessive fuel/air supply when the throttle is opened suddenly. The system adjusts the throttle valve opening via a servomotor at intervals of 1/100th of a second. By constantly calculating and adjusting the optimal throttle opening and intake air volume to match the prevailing engine running conditions, the YCC-T consistently ensures that the new YZF-R1 engine produces an optimum drive torque curve - and the ignition timing is mapped separately for each cylinder in order to ensure efficient combustion processes.
Fuel injection system with secondary injector
The YCC-T operates a highly-efficient twin injector type fuel injection system which is designed to deliver outstanding throttle response and remarkable performance at all riding speeds.
This twin injector system features a main injector together with a secondary injector, which is situated at the upper edge of the funnel. The secondary injector comes into operation in the engine's mid to high-speed range to complement the main injector, and this design ensures remarkable response and outstanding acceleration and performance.
D-mode Map
For the first time on a Yamaha supersport model, the new YZF-R1 is equipped with a D-mode Map which works in association with the YCC-T (Yamaha Chip Controlled Throttle) and allows the rider to select a performance profile to match their requirements.
The D-mode Map consist of three modes which are: Standard mode; A mode; and B mode; and the rider can choose which mode is best suited to the prevailing riding conditions by operating a switch on the handlebars. Standard mode is mapped to give optimum all-round performance, while the A mode delivers sharper engine response, and the B mode gives a gentler response to the rider's throttle inputs.
Redesigned forced air intake
The YZF-R1's redesigned forced air intake system utilises the natural airflow to increase the pressure of the air in the airbox, and this ensures increased levels of power at higher speeds for outstanding performance. This system takes air in through the front cowl, and channels it via the left and right sides of the new frame, directly into the airbox. For 2009 the YZF-R1's forced air intake system incorporates special new side branches which reduce intake noise.
Slipper clutch
For even more stable handling performance when decelerating during quick downshifting, the 2009 YZF-R1 is equipped with a slipper clutch. This clutch features a mechanism that adjusts clutch spring load when excessive torque is transferred from the rear wheel to the crank when the rider changes down through the transmission. By controlling excessive engine braking forces, this system enhances overall controllability.
4-2-1-2 exhaust and twin up-slanted mufflers
In order to ensure an effective exhaust pulsation to complement the new engine's crossplane crankshaft, an all-new exhaust system is fitted, in which the exhaust pipes for the 1st and 4th cylinders and for the 2nd and 3rd cylinders are brought together in a 4-2-1-2 layout.
The stylish triangular-shaped mufflers emit a sharp, gutsy exhaust note which complements the unique pulse created by the asymmetric firing sequence of the new crossplane crankshaft. The triangular design also contributes to the tighter and more compact body design of the all-new YZF-R1, while at the same time giving the bike's rear end a sharp new look.