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Sportbike Yamaha YZF-R6S 2009

Ultra-compact, lightweight, 600cc, DOHC, 16-valve, liquid-cooled, in-line four-cylinder engine puts out over 200 horsepower per litre!

Specially designed, one-piece cylinder and upper crankcase assembly provides superior engine rigidity and reduces weight.

Ceramic plated sleeveless cylinder bores provide greater heat dissipation for consistent power delivery and reduced frictional power loss. Sleeveless design also reduces weight.

Lightweight forged pistons feature carburized connecting rods for superb strength and reduced reciprocating mass. The result is incredible engine response.

Hollow side-driven camshafts with specially designed valve lifters helps create a very narrow engine.

Mikuni competition-bred suction-piston throttle body fuel injection with 40mm throttle bodies features short intake ports and a special vacuum-controlled intake system to ensure instant seamless throttle response all the way up to the incredible 15,500-rpm redline.

Ram Air Induction System delivers cool, high-pressure air "force-fed" into the intake tracts for optimal combustion and greater horsepower at higher speeds.

Close-ratio 6-speed transmission delivers seamless power and maximum acceleration. Gear widths, splines and engagement dogs are optimized for smooth shifting under power.

"Tri-Axis" or stacked transmission design creates a more compact engine front to back that allows for optimum engine placement in the frame for optimized balanced weight distribution and incredible handling.

Heavy-duty, large-capacity clutch ensures consistent, fade-free performance.

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 non-ring type fan.

High capacity water pump and separate liquid-cooled oil cooler ensures consistent engine temperatures for maximum performance.

Direct ignition coils, iridium 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.

4-into-2-into-1 exhaust optimizes engine performance, and features a mix of stainless steel, titanium and aluminum to reduce overall weight.

High powered 32 bit ECU (electronic control unit) with mapping provides ultra precise ignition timing for maximum response and power output at all rpms.