
The Kawasaki contradiction: The ZX-10R isn't lighter, it just feels like it
What's more important, brains or brawn? And what about agility? Or beauty?
It only takes one time accelerating out of the final turn at Losail International Circuit in Qatar on the 2008 Kawasaki Ninja ZX-10R to be reminded that Ninjas never did lack muscle. In second gear, the front end gets light as the power comes on smoothly, the slightest of headshakes (slighter than the previous model would have exhibited, for sure) waggles the handgrips, and the kilometer-long straight looms ahead, questioning just how much nerve you have when it comes to twisting the throttle.
Brawn? Check.
It's the other three areas where Kawasaki made the biggest changes to its Superbike platform for 2008.
But before moving on to that, it's worth reviewing the work Kawasaki engineers did to keep their literbike competitive in power output. The goal was to keep the previous Ninja 10's low and midrange power, while boosting high-rpm performance to make the motorcycle even more track-ready. Dual fuel injectors and new, oval-shaped throttle bodies feed the fuel-air mixture past titanium valves into revised combustion chambers, and cam profiles were tweaked to increase top-end power.
But the really interesting advances with the new Ninja aren't in the engine, but in the brains, agility and, to a lesser extent, the beauty categories. The Kawasaki Ignition Management System (see the sidebar, right), combined with the new dual injectors, is intended above all to improve throttle response, said Karl Edmondson, Kawasaki's sportbike project manager.
With hundreds of fuel maps on board and an ECU monitoring conditions 50 times a second, it's clear Kawasaki can check "brains" off the to-do list. The system may be complicated, but it works simply well. More on that later.
Of all the changes to the ZX-10R for 2008, the most noticeable when riding the bike are the improvements to handling. If all you did was compare 2007 and 2008 ZX-10R spec sheets, you might reasonably assume the 2008 would be a slower-handling motorcycle. Reality is exactly the opposite.
Despite slightly more rake and trail, an extra inch of wheelbase and eight more pounds, the 2008 turns more quickly and feels lighter than its predecessor. The sensation is heightened by the new bike's smaller, slimmer dimensions.
How did Kawasaki make a heavier bike feel lighter? You don't have to be an engineer to notice that the previous model's two underseat exhaust cans are gone. The weight of the exhaust system is about the same, with its catalysts needed to meet Euro III emissions standards, a collector underneath the engine and just ahead of the rear tire, and a new titanium exhaust on the right side. Now, however, that weight is much lower and closer to the center of the motorcycle.
While the frame was being updated, the ram-air intake duct's path past the steering head was re-routed to make it a straighter shot into the airbox.
The 2008 Ninja gets a new look to go along with the new hardware. The styling of the previous model focused on optimum aerodynamics, with curved surfaces designed to move smoothly through the air. But what looks good to the wind doesn't always look good to the human eye, and many found the 2006-07 ZX-10Rs to have a beady-eyed, overly rounded shape.
Kawasaki paid particular attention to the parts of the motorcycle that come in contact with the rider to provide maximum feedback for the rider. The upper part of the tank is flared, making it natural for the rider to have his outside arm resting against the tank while hanging off in a turn. Similarly, the area where the rider's knees press against the frame is shaped to fit the human form and covered in a grippy material.
The chance to try out all these changes came at Losail International Circuit, the world-class motorcycle track built just a few years ago in Qatar to attract MotoGP and World Superbike rounds to the Middle East. For many of the U.S. writers who traveled to Qatar for the intro, it truly was a trip halfway around the world (12 time zones) just to test the new Ninja. But Kawasaki folks knew what they were doing. The smooth, fast Losail circuit will make any good motorcycle look its best, and allow a fast motorcycle to unleash its power on that long straight.
See that green slice on the tach at left? Keep the needle pointed anywhere in that space and smooth power just rolls on at your command. But even at lower rpm, throttle response is seamless and glitch-free. Kawasaki says peak power hits at 11,500 rpm.
A few times it was a bit difficult to find neutral on the six-speed transmission when rolling to a stop in the pits, but that's perhaps a tradeoff for the fact that I never hit a false neutral in seven riding sessions over two days. In fact, I never missed a shift at all.
Where the ZX-10R shined most was In Losail's endless series of turns. Totally flat and nearly devoid of reference points, Losail can be a confusing track to a newcomer. Two turns may be quite different yet look alike on entrance. When I made a mistake and forgot which flat righthander I was approaching, the Ninja had plenty of extra in reserve. Just lean it further and ride through it. It's worth noting that in two days of riding by nearly 30 writers from five countries, not one motorcycle ended up on its side or even took an excursion into the gravel traps.
Despite all that, here's what I can say for sure: For an intermediate-level track-day rider like me, the 2008 ZX-10R is easier to ride quickly than its predecessors or other literbikes I've yet sampled. The stability and handling gave me the confidence to dip deeper into the Ninja's well of power than I would otherwise.
What if you ride a faster pace? Well, U.S. racer Kenny Noyes, who grew up in Spain and currently races there professionally, was also testing the ZX-10R. He turned in some hand-timed laps in the 2:07 range around Losail. That's within 10 seconds of the best lap times turned in by World Superbike riders just a week earlier in testing. And Noyes was riding a street-legal bike in stock form (except tires), mirrors in place, turn signals in the wind, and headlight blazing.
That combination of brawn, brains and agility will soon be parked on your Kawasaki dealer's showroom floor, available for $11,549.

