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2009 Yamaha YZF-R1Key Features
In the supersport liter class, theres always lots of talk about power. You expect that. What you wouldnt have expected until now is a radically superior way to deliver that power. Introducing the 2009 YZF-R1, the first ever production motorcycle with a crossplane crankshaft. Crossplane technology, first pioneered in MotoGP racing with the M1, puts each connecting rod 90 from the next, with an uneven firing interval of 270- 180- 90- 180. This all but eliminates undesirable inertial crankshaft torque, which allows the engines compression torque to build smoothly and provide a very linear power delivery out of the corners. Its a feeling thats simply unmatched, like having two engines in one: the low rpm torquey feel of a twin with the raw, high-rpm power of an inline 4. In fact, the new YZF-R1 is not a continuation of existing supersport development; it is breakthrough technology that represents a paradigm shift in both technology and performance.
This next-generation R1 keeps all the technological superiorities developed for its predecessor: YCC-T (Yamaha Chip Controlled Throttle) is MotoGP inspired fly-by-wire technology used to deliver instant throttle response. YCC-I is Yamaha Chip Controlled Intake which is a variable intake system that broadens the spread of power. The fuel injection system provides optimum air/fuel mixtures for maximum power and smooth throttle response.
The R1 features Yamaha D-MODE (or drive mode) with rider- selectable throttle control maps to program YCC-T performance characteristics for riding conditions. The standard map is designed for optimum overall performance. The A mode lets the rider enjoy sportier engine response in the low- to mid-speed range, and the B mode offers response that is somewhat less sharp response for riding situations that require especially sensitive throttle operation. Switching maps is as easy as pushing a button on the handlebar switch.Features & Benefits:
Crossplane crankshaft technology proven in victory after victory on MotoGP machines provides a high-tech uneven firing interval. Unlike typical in-line-four engine design, where the two outer and two inner pistons move together in pairs with 180intervals, the crossplane crankshaft has each connecting rod 90 from the next with a unique firing order of 270 180 90 180.This overcomes the inherent fluctuations in inertial torque during each engine revolution, and the accompanying peaky torque characteristics. Instead, compression torque continues to build, giving the rider more linear throttle response with awesome power and traction out of the corners.
To maximize rider comfort as well as power output, this newly designed engine adopts a coupling-type balancer that rotates in the opposite direction as the crankshaft.
This engine features new forged aluminum pistons to takemaximum advantage of the power characteristics. As proven on previous models, titanium intake valves are lightweight titanium.
The frame is completely revamped, with a combination of uncompromising rigidity where needed along with carefully achieved flex for the precise rigidity balance this bike needs to give the rider the full benefit of its handling and engine characteristics. No one- technique-fits-all-needs design, it is a sophisticated combination of CF die-cast, stamping, and gravity casting the exact technology needed for each portion of this advanced frame.