Kawasaki KX450F makes for one wild ride / Second model year already is…

19 Май 2015 | Author: | Комментарии к записи Kawasaki KX450F makes for one wild ride / Second model year already is… отключены
Kawasaki Square Four 2 Stroke Prototype

Kawasaki KX450F makes for one ride / Second model already is a major reworking

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As I flew through the air at Southern Lake Elsinore, there was a when I marveled at the power of the new Kawasaki KX450F motocross That was after I had lifted off my bunny jump but before I rubber side up, grinding my into the dirt.

There’s a low-caliber dirt riders ride grade-A motocross of the four-…, 450cc variety. missiles in Skittles-colored clothing.

into supercross season, I to get a taste of the technology that’s racers, and the sport itself, to new of derring-do and popularity. That led me to the — the bike helmed by hotshot James Stewart. favored to win the upcoming AMA Supercross Series now that reigning Ricky Carmichael is racing an schedule.

The 2007 is the second year for the KX450F, and already a major reworking. Ordinarily, bikes are on a two-year product-improvement but the company made more 50 changes to the KX450F. The pace of technology and the rate of adoption to stay competitive are that

Over the last decade, motorcycle sales have from 79,000 in 1995 to in 2005. The Motorcycle Industry doesn’t break out individual figures for play bikes, sports and motocrossers, but the sold-out events, maxed-out motocross and six-figure endorsement deals are indicators that competition are a big piece of the pie.

On the KX450F, of the most significant changes the intake (which was revised new camshafts) and a tapered (rather straight) exhaust, both of work together to give the better low-RPM performance, torque and acceleration out of corners. The twinspar frame was also to give the bike less rigidity, i.e. to allow a more flex and better when ridden like a

The diamond-like coating on the Kayaba tubes is also new. An first for a production motocross the coating helps smooth the action as the front end works its way the track. Then there’s the gear.

Last year’s had four, but the pros were out on particularly fast tracks, so the model has five.

Personally, I got past second, which plenty fast as I carved the bobble-headed the whoops and rolled the I was too chicken to fly over by more a few inches.

What hasn’t with the ’07 model: the saddle and the kick start, of which freaked out my street-riding especially in combination. The 38-inch helps give the bike inches of much-needed ground down below, but I wasn’t so I could throw a leg over, though I’m 5 feet, 8 tall.

It wasn’t as bad as I’d For maximum suspension performance, the is best with about 4 of sag in the rear. The sag in the back balances the with the front and allows the to drop into and pop out of the bumps and on the course.

Adjusting the spring brought the down to 34 inches when I put my on it, so I wasn’t SOS (seat off seat), tippy toe. Of course, doesn’t matter once you get — only when stopped. Or you’ve wiped as I did.

That brings us to the start. There’s only one motocrosser on the market with an start on the grip, and the KX450F it. Competition off-roaders don’t them because an electric can add 5 to 10 pounds.

On a 220-pound bike, every ounce counts, a lot of extra weight for no good Anyone wanting a KX450F an electric start will to wait for the 2008 KLX450R the off-road version of the purpose-built, KX450F.

Ever ridden one of these ponies? Even without the motor, stiffened suspension and performance enhancers, the KX450F is a of a machine.

Stock engine is one of the reasons motocross is becoming of a four-… world. You don’t to spend a lot of money and time with performance pipes and mods; they jump right out of the box. The power is also less abrupt and linear on a four-….

Until the ’90s, when Yamaha out its four-… 400 prototype, motocross was a affair. Manufacturers just believe it was possible to make a motocrosser that was powerful, and lightweight enough to compete. But the YZM400 proved it could be

By 2003, Honda had jumped on with a four-… 450. came KTM, Suzuki last year, Kawasaki.

Kawasaki Square Four 2 Stroke Prototype

recent decision to terminate says it loud and clear: now dominate. It isn’t the high-pitched of two-strokes reverberating around the these days but the bass of their four-… brethren.

Why’s it changing? Some of increasingly strict emissions Two-… motors are a simpler and produce more power per than a four-…, but because work with a gas-oil they’re more polluting and fuel efficient.

Now that have been able to the technology of the cleaner-running, four-… and improve its power-to-weight ratio, are taking over, especially at the pro

The two main classes in AMA motocross and its indoor counterpart, supercross, are lites and the 250cc motocross/supercross but the bikes in the 125cc class are 250s, and the bikes in the 250cc are 450s. AMA rules deem two-strokes competitive with four-strokes, and 250 two-strokes competitive 450 four-strokes.

There’s been grousing that the equivalents so equivalent anymore — four-… technology has evolved so it actually has an edge. But the AMA’s formula is designed to encourage competition and different engine a mission accomplished with like the Throttle Jockey-throwing

A bike that told me in no terms: You’ve gotta your way up to be worthy. 2007 KX450F

Base price:

Power train: Liquid-cooled, single with DOHC and valves, five-speed


Suspension: 48mm inverted fork with DLC coated UNI-TRAK linkage system

clearance: 13.58 inches

Kawasaki Square Four 2 Stroke Prototype
Kawasaki Square Four 2 Stroke Prototype
Kawasaki Square Four 2 Stroke Prototype


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