2011 Yamaha YZF-R6 are to be the most exciting bike to ride on the track and the most fun sport bike to ride on winding roads. The engineers tweaked the mid range performance last year but don’t worry, the high rpm rush that has made the Yamaha R6 famous is ready when you are. Confidence, agility, performance and most importantly fun.2011 Yamaha YZF-R6 is designed to do one thing extremely well: get around a race track in minimal time. It’s about a screaming, 15,000 rpm plus fuel injected four cylinder engine in a taut chassis that lets it snap from upright to full lean instantly. Oh year: It’s a great street bike too.
ENGINE 2011 Yamaha YZF-R6
Ultra-compact, lightweight, short stroke, 599cc, DOHC, 16-valve, liquid-cooled, in-line four-cylinder with lightweight titanium valves produces incredible horsepower. Redline is set at an amazing 16,000rpm. 67mm bore and 42.5mm stroke provide a fast revving powerplant. Engine width is minimized thanks to Yamaha’s special casting technologies and “liner less” cylinder design. Compact “pent roof” cylinder head design features ultra lightweight titanium valves for both intake and exhaust. The intake valve angle is 11.5 degrees and the exhaust is 12.25 degress. The intake valves are 27mm in diameter while the exhaust valves are 23mm.
Mikuni fuel injection system with 41mm throttle bodies features twin injectors (primary & secondary). This type of twin injector system is also found on our MotoGP M1 machine and the latest generation R1. Each of the injectors utilizes 12 spray holes to maximize the atomization process. The secondary injectors, located inside the airbox, begin to function at mid rpms (6,000 to 7,000rpm) thru to redline. This system is lighter and simpler than the sub motor driven secondary valve type FI system. Special short intake tracts allow for higher rpms and improved power.
Yamaha Chip Control Throttle (YCC-T) is another 1st for Yamaha. This system electronically controls the throttle valves for outstanding response and improved controllability at high rpms. The system features Throttle Position Sensor (TPS) and D.C. motor driven throttle valves. The YCC-T system electronically controls the throttle valves for outstanding response and improved controllability at all rpms. The YCC-T is used to provide even more control of the intake air volume for a smoother torque character. The YCC-T features 3 – ECU’s inside the main ECU to control ignition, fuel injection and the YCC-T. This special ECU is capable of responding to changes at a speed of 1000th of a second.
Yamaha’s exclusive YCC-I electric-control servo motor-driven variable intake funnel system is a world’s 1st on a production motorcycle and works in conjunction with Yamaha’s fly-by-wire technology and FI systems.7.6 litre air box utilizes a high flow viscous paper type air filter. Ram Air Induction System with centrally located intake duct delivers cool, high-pressure air “force-fed” into the intake tract for optimal combustion and greater horsepower at higher speeds. This design provides straight induction from the central fairing duct to the airbox without a lot of bends or turns.
Close ratio 6-speed transmission delivers seamless power delivery and maximum acceleration. Gear widths, splines and engagement dogs have been optimized to handle the R6′s power. The shift drum and shifting mechanism are located on the right side of the cases for smooth shifting feel under power. The gears use flat contact-type engagement dogs for positive shifting and great durability.
The “Tri-Axis” or stacked transmission design creates a more compact engine front to back that allows for optimum engine placement in the “sweet spot” of the frame for optimized weight distribution and incredible handling.Slipper or back limiter clutch assembly reduces rear wheel hop when making hard down shifts or under hard braking. Key benefit is reduced lap times and smoother control when participating in either a race or track day. This clutch uses 9 paper based friction plates and 8 steel plates, plus 6 coil-type clutch springs.
The oil lubrication system has been optimized to reduce frictional loses caused by “oil drag”. It features a “two side” oil pump. There is a separate liquid-cooled oil cooler to insure consistent engine temperatures for maximum performance and extended service life.
High capacity cooling system features a curved radiator with dual ring-type fans for excellent engine cooling efficiency. The ring-type fan offers more airflow than a conventional type fan. Direct ignition coils, iridium dual electrode spark plugs and high-output magneto deliver reliable, super strong spark. With this system, the ignition coils are integrated into the plug caps, significantly reducing weight.
The exhaust system also features Yamaha’s EXUP System (Exhaust Ultimate Power Valve) utilizing a titanium body and butterfly valves that prevent the “blow back” phenomenon caused by “valve overlap”. This design reduces weight and maximizes cornering clearance. The EXUP system eliminates “flat spots” in the power band and reduces emissions too. This is a 1st on a 600cc supersport machine. High powered 32 bit electronic control unit actually contains three ECUs inside the main ECU to control the FI system, the YCC-T system and the ignition system. Air Injection System (AIS) injects fresh air into the exhaust ports to fully burn any unburnt fuel in order to reduce harmful CO & HC exhaust emissions
Yamaha 2009 YZF-R6
2010 Yamaha YZF-R6
Photo Gallery 2011 Yamaha YZF-R6