Dirt Bikes

WR450F

Off-road Riding's answer to MSG

If you ride for the taste, then consider this the flavour enhancer of your dirt biking experience. There’s nothing like the full-blooded, red-meat-and-three-veg thrust of a big-bore rooster like the WR450F to get that adrenalin pumping.

The second thing you’ll notice about riding the WR450F (the first being a slight blurring in the periphery of your vision), is just how tractable and controllable our engineers have managed to make a big horsepower dirt bike.

The WR450F’s rock-solid reliable, five-titanium-valved engine is nestled in a YZ-bred aluminium frame carefully engineered from castings, forgings and extrusions, that provides just the right amounts of both flexibility and rigidity where it’s needed.

Fast, forgiving, fat free… and deliciously fast.

With 449cc of liquid-cooled DOHC four-stroke and five titanium valves delivering broader power than ever, high over-rev capacity and crisp, linear throttle response, there’s not much that can stand in your way. Special camshafts, carburation, intake ports and exhaust all work together to produce an engine with mind-boggling low- and midrange power and a bullet-proof reputation.

WR250F

The equaliser... and then some

Right from its very first appearance in the bush, the WR250F has been an institution in off-road racing and riding performance, with its unique blend of nimble handling, exciting power delivery and superlative engine reliability. Time inevitably brings change, and here’s what’s changed since then: The WR250F has become sharper handling, faster and more reliable still. Because why just be equal with the opposition?

YZ450F

The theory of revolution

When an existing design approaches its limits, it’s time to call in the revolutionary thinkers. The creative minds who aren’t afraid to throw everything out and start from scratch.

Which is exactly what happened with the latest incarnation of our championship dominating MX bike. Accepted wisdom has been turned on its head to produce our most effective motocross bike yet. Meet the revolutionary new 2010 YZ450F.

The 2009 450F captured back-to-back World and Aussie MX titles as well as the World and AMA SX crown, so the challenge to take the open class weapon to the next level was a big risk. Because to reach that level, a new approach was needed.

The solution looks simple, but the decision was bold… take mass centralisation in a new direction by fitting a rearward facing and backward tilted cylinder. Now the heaviest part of the bike is closer to the middle… right where it needs to be for amazing levels of flickability.

But theory is nothing without practice to back it up, so Yamaha testers nailed berms, scrubbed jumps and blitzed straights lap after lap to fine tune the new design, to confirm the agility of the new bilateral beam frame, the linear power delivery offered by the sweet fuel injection system and awesome punch from the high torque four-valve motor.

It’s not change for change’s sake. It’s the lightest handling, whoop-skimming YZ450F yet

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YZ250F

All-new YZ250F is the Ultimate Corner Carver

Ask any motocross rider where races are won and lost and odds on he’ll tell you its all in the corners. A light, nimble and supreme handling MX bike can pick its lines and stick to them, enabling its rider to hang on longer and go harder.

So it’s no surprise to learn that cornering performance was the guiding theme throughout the development of the new model YZ250F.

The next generation motocross development plan was hatched with rider involvement paramount. Trackside customer research led Yamaha engineers to discover that what riders wanted more than anything else was sharp handling. Riders of all abilities from pros right down to swappers. And by handling, they meant better cornering performance. Because a better handling bike lets a rider get on the gas sooner, is less tiring to ride and is the key to winning motocross races.