Two years ago, Honda's first RR-spec 600 was maligned for a 445-pound wet weight--30 pounds heavier than an equivalent Yamaha YZF-R6. For Hitoshi Akaoka, large project leader for the '05 CBR600RR, saving weight was a priority from the beginning, but it had to be lighter in all the right places. "One of our main goals," Akaoka says, "was to improve feel through transitions." A simpler, lighter muffler and rear subframe help on both counts, saving weight high in the chassis where you notice it most. Akaoka found extra ounces everywhere. Thinner walls in the main spars and elsewhere took 3.6 pounds out of the '05 frame without compromising rigidity. The Unit Pro-Link swingarm's upper shock mount is cast in rather than bolted on, saving a few ounces and making the mechanic's life easier in the bargain. The shock itself is shorter and lighter, with an aluminum adjuster replacing last year's steel bit. A gull-wing-style top triple clamp allows shorter, lighter fork tubes. The front axle is shorter and lighter. So are the footpeg and handlebar mounts.