New-generation YZF-R1: Highly purified excitementThe radical and innovative 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.
Since the original YZF-R1 was released into an awe-struck marketplace, Yamaha’s flagship 1,000cc model has established a reputation as being one of the most innovative and exciting motorcycles in the large-capacity supersport class. For 2009 that outstanding reputation is sure to be reinforced more than ever before!
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.
Crossplane crankshaft engine for purer torque output
Rather than look exclusively to additional electronic aids to further enhance the new YZF-R1’s performance and controllability, Yamaha’s engineers have opted for a mechanical solution.
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.
Engine Technical Highlights
• MotoGP-developed 998cc liquid-cooled inline 4-cylinder 4-valve DOHC
• 133.9 kW (182 PS) at 12,5000 rpm (in France: 78.1 kW (106 PS) at 10,000 rpm)
• 115.5 Nm (11.8 kg-m) at 10,000 rpm (in France: 90.3 Nm (9.2 kg-m) at 7,000 rpm)
• Short-stroke, big-bore design
• Bore x stroke 78.0 mm x 52.2 mm
• Crossplane crankshaft
• Uneven 270º - 180º - 90º - 180º firing interval
• Newly-developed forged aluminium pistons
• Closed-deck ceramic-composite plated cylinder
• Fracture split (FS) carburized con rods
• Optimised large-diameter crank journal and flywheel mass
• YCC-I (Yamaha Chip Controlled Intake)
• YCC-T (Yamaha Chip Controlled Throttle)
• Fuel injection system with secondary injector
• D-mode Map
• Redesigned forced air intake
• Slipper clutch
• 4-2-1-2 exhaust and twin up-slanted mufflers
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