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While the ZZR is the only "all-new" introduction, that doesn't mean there aren't other significant changes to Kawasaki's sportbike line. Even the ZX-12R, introduced just last year, has been more than slightly altered. After losing out in magazine top-speed shootouts last year to the Suzuki GSX- 1300R Hayabusa, a motorcycle with similar power but superior aerodynamics, perhaps it's not too surprising that Kawasaki has improved the 12R's aerodynamics. A wider fairing with a higher bubble enhance rider wind protection while giving what Kawasaki describes as a "one point drag coefficient reduction," continuing a long tradition among Japanese manufacturers of quoting aerodynamic performance with incomparable or meaningless numbers. The ram-air system was improved at the same time, and a number of changes were made for better rideablility. These include increased crank-shaft inertia, a non-linear throttle linkage, and reduced free-play between the gearbox dogs and elsewhere in the driveline. These are all changes designed to make the ZX-12R respond more smoothly and predictably at small throttle openings and during throttle-opening transitions.
Handling has been addressed, as well. Slightly increased rake (trail remains the same) and stiffer fork settings are intended to enhance steering feel when braking into a corner, while redesigned rear suspension actuates an improved damper with a softer spring through a new linkage.
And while the ZX-9R isn't all-new for '02, either, it too is substantially altered. As with the 12R, Kawasaki engineers aimed for more controllable low-speed response with a 10-percent boost in crankshaft flywheel inertia. On the chassis side, the top engine mount (replacing downtubes) has been moved closer to the steering head to increase chassis stiffness. A new, stiffer swingarm was added, and the rear suspension linkage was revised for more linear action. Front brakes grew from 310 to 320mm, while the rear rim grew .5-inch to a full 6 inches in width. In the category of small details that eventually add up to pounds, new axles are larger in diameter but hollow, for a better stiffness-to-weight ratio, and the drive chain shrank from a #530 to #525.
Finally, with all the changes to the other ZXs, the middleweight ZX-6R returns essentially unaltered, leaving something for next year.