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Kawasaki KX450F


 The Kawasaki KX450F is the most powerful Japanese 450cc motocross bike in production. The 450cc motocross division has changed this past year with a full-force jump into the fuel-injection technology, and the Kawasaki KX450F is a major player. Big and burly, the Kawasaki KX450F is known as a beast of a machine in a class already filled with brutes.
The KX450Fs engine becomes even more rider friendly for 2010.
Although it looks identical to the ’09 machine, the 2010 KX450F employs engine and chassis changes aimed at making the bike easier to ride.

Introduced in 2006, the Kawasaki KX450F has been winning races right from the start. James Stewart piloted the KX450F to a FIM World Supercross and AMA Supercross title in 2007. He then swept the 2008 AMA Motocross Nationals with a perfect 24-for-24 season thanks to supreme skill and the competent KX450F.

The 2009 model is the second-generation Kawasaki KX450F, so in addition to the 43mm Keihin throttle body fuel injection with aluminum fuel pump, the KX450F also received updates to the motor’s top end and crankshaft, a slimmer chassis, updated Kayaba fork with DLC coating and a larger 50mm shock. Visually the Kawasaki KX450F is different also with new bodywork and graphics.

Tim Ferry and Ryan Villopoto are using the factory racers using the Kawasaki KX450F to assault the AMA Motocross and AMA Supercross division. Both riders should find great success outdoors where the KX450F can use all the power and speed provided by Kawasaki engineers. Our test riders picked the Kawasaki KX450F as the best 450 MX bike of the year.
Kawasaki KX450F Motorcycle Reviews
2010 Kawasaki KX450F Comparison
Friday, January 01, 2010
MotoUSA rounds up four of the best open-class motocross bikes on the planet from Honda, Yamaha, Kawasaki and KTM for our 2010 450 Motocross Comparison.
2010 Kawasaki KX450F First Ride
Monday, August 10, 2009
We romp around the motocross track on the 2010 Kawasaki KX450F motocross motorcycle. Read how the new KX stacks up in the world of off-road motorcycles in the Motorcycle USA first ride review.
2009 Kawasaki KX450F Comparison
Monday, November 24, 2008
Hop on the new KX450F and you'll probably need a professional tailor to lengthen your shirt cuffs. The 2009 Kawasaki makes a ton of power!
2009 Kawasaki KX450F First Ride
Monday, September 22, 2008
MotoUSA puts in some laps aboard the all-new 2009 Kawasaki KX450F at Muddy Creek MX Park in Blountville, Tennessee.
2008 Kawasaki KX450F Comparison
Wednesday, April 09, 2008
It took a long time to get dialed in, but the wait was worthwhile after sampling the amazing motorcycles offered in MotoUSA's 2008 450 Motocross Shootout.
2007 Kawasaki KX450F Comparison
Sunday, February 11, 2007
We set out to discover what another 365 days of Darwinian Theory has done to the latest crop of 450 motocross bikes.
2006 Kawasaki KX450F First Ride
Monday, October 17, 2005
Kawasaki completely re-vamped it's '05 prototype to finally satiate the starving mass of green riders who have been longing for a big-bore thumper.
Kawasaki KX450F Features
Kawasaki KX450F Mammoth MX Race Project
Friday, July 16, 2010
MotoUSA competes in the legendary Mammoth Motocross event with its 2010 Kawasaki KX450F project bike.
Kawasaki KX450F First Looks
2011 Kawasaki KX450F First Look
Tuesday, May 25, 2010
Kawasaki releases and updated KX450F motocross bike for 2011. Find out the technical details in this motorcycle First Look review.
2010 Kawasaki KX250F and KX450F First Look
Tuesday, June 16, 2009
Kawasaki pulls the tarp off its 2010 KX motocross lineup including the KX450F, KX250F and KX85. These Kawasaki dirt bikes get updates to help keep them at the top of motocross racing competition.
2009 Monster Kawasaki KX-F Models
Friday, June 20, 2008
For 2009, the KX and KX-F models are available in a special set of Monster livery with black plastic and green accents, including trick green wheel hubs and black rims.
2009 Kawasaki KX450F KX250F 1st Look
Tuesday, June 17, 2008
A fuel-injected diet gives the new KX450F a fresh form while the KX250F gets even edgier styling and a revised chassis.