Honda is really nice, but I think its overpriced. I used to be a suzuki man myself but it seems like they are ignoring the 600 class more and more every year. This is what is improved on the yamaha this year and is the most advanced 600, and that it redlines at 17,500 RPM

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Taken from their website:
"The YZF-R6 is the first production motorcycle with a fly-by-wire throttle systemfor flawless response under all conditions."
-YCCTYamaha Chip Controlled Throttle-sweet innovation taken from the MotoGP bike. Very cool almost as cool at honda's digital steering dampner.
"Straight frame concept: developed from the Yamaha M1 GP machine, the YZF-R6s steering head, swingarm pivot and rear axle all lie in a straight linefor unsurpassed handlingwith an all-new inline four-cylinder engine designed for optimal layout and mass centralization."
-Bleh suzuki did this last year on their 1000, but nice that yamaha added it to the 600
"Slipper-type back torque-limiting clutch greatly facilitates braking/downshifting from high speed."
-Only the kawasakis zx6r has this I believe
"Formula 1-style air management presents very small frontal area and excellent aerodynamics; new ram-air induction ducts cool, high-pressure air through the steering head for optimal combustion, more horsepower and enhanced engine cooling."
-Whatever I think that all bikes have this but they integrated it with their YYCT which makes it special
This did this all to their 600 and kept it at ~9,000. Pretty sweet deal. And they also increased the bore in the motor for more power!!