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2008 Yamaha YZ450F Intro Photo Gallery

Motorcycle USA got a chance to kick up some roost aboard the new and improved 2008 YZ450F dirt bike. Check out our 2008 Yamaha YZ450F First Ride

Slideshow
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YZF Video
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At the heart of the YZ450F is a 449cc DOHC 4-stroke with a 95 X 63.4mm bore/stroke and a compression ratio of 12.3:1.
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The stock tires hooked up well on the sandy Milestone Motocross Park which validated Yamaha's move to a larger rear tire.
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Alvin Zalamea kicks up some roost as he wheels the big 450 around the Milestone MX Park.
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Catching air on the big thumper is no problem thanks to the YZ's modified 449cc DOHC 4-stroker.
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The powerful 4-stroke encourages airborne antics.
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A lot of racers will be watching the YZ450F blow by them if other manufacturers don't keep pushing the envelope.
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The improved suspension of the 2008 YZ450F helps soften the landings even when you come in hard.
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Changes to the YZ450F's chassis left a positive impression on our testers and made them fearless through the ruts.
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'When the front wheel finds what it's looking for, it sticks like gum on the bottom of your shoe.' MCUSA's Waheed is never short of colorful analogies.
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It only takes a light twist of the throttle to engage in a little one-wheeled fun.
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The rear on the 2008 Yamaha YZ450F has a wider 120/80-19 Dunlop D756 and a 245mm single wave-style disc brake.
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Let 'er rip, AZ. Once again, Zalamea beckoned MCUSA's call when it came time to put the YZ fo-fifty to the test.
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Our testers claim the suspension action is much improved over last year's bike which gave riders confidence when attacking tight corners.
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With minor tweaks to the engine, a new exhaust, an upgraded chassis and tweaks to the suspension, Yamaha has the 2008 YZ450F dialed in tight.
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A shorter steering head pipe and stem and a lighter forged lower triple clamp help the YZ450F turn in quicker and easier than in years past.
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The 'punched cone' muffler is new for 2008, almost six inches shorter than last year's can which shaves about half a pound.