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NEW 2010 YZ 450f WOW!!!

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The over use of smilies detracts from your message, but nice effort.

Its very similar to the 250f but there are some slight differences.

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Nice to see something truely new and different instead of mildly re-worked frame or head design or new suspension settings. Can't wait to read the tests on it.

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Seven pounds heavier than the 2009. I guess a more compact weight though.

They even increased the travel a little.

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One fairly significant change I noticed is that they went to a 4-valve layout. The 250F keeps the 5-valve. I wonder if this has to do with the new engine position and intake/exhaust redirection, the addition of fuel injection or if there is something else going on.

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Awesome..love to see multiple changes..looks like the yamaha engineers have been busy this last year.

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Yamaha is THE company to bring new tech to bikes of all the big 4...hands down.

+1, this is radical, so many new things in one model change, and new concepts:applause: :busted:

Well they pioneered the new age 4 stroke, they may as well pioneer the next generation 4 stroke too

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Hopefully, this won't be a Japanese Canondale.

The frame rails look rather wide. I wonder if riders with knee braces will complain.

Also, I wonder if that heating coil exhaust will cook the shock while running slow trails off-road.

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so those 'fake' CAD drawing floating around turned out to be true?

Yup!!

Should be a lot of TT members eating crow over this one.

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Looks like it could potentially damage/crack/break piston skirts with the offset crankshaft.

Not immediately, but over time of course. Not a problem with regular maintenance.

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