It's Here...the 2010 YZ450F


Looks awesome. I need a better paying job.

Now I want to here the tests

I firmly withdraw my previous comments about 2010 YZF's "BNG".

If those photos are truly production versions, that bike is totally new. That engine configuration is trick!

I see they already offer an EFI tuner for it. Very Cool.:busted:

So, it is a lot of the things it was rumored to be:

  • Inverted head
  • EFI
  • 4 Valves
  • Rear slanted cylinder
  • Air box up front

The shock looks cool, but it's not electronic (squashed that one)

The bore/stroke revision and the cylinder offset are very interesting.

The intake port is a thing of absolute beauty.

Anyone see any hard info regarding split oil supplies or wet vs. dry sump?

97mm bore and 60.8mm stroke...interesting. So is the cylinder being offset from the crank.

Well, If this does'nt make a 450 feel light? Then I dont know what will?

Yamaha will sell thousands of them even if they don't work better than the older ones (although they probably will work better!) simply due to the "trickness" factor.

My next diesel will be fuel injected for sure . . . no more jetting.:-)

Looks big and clumpsy ! The 2009 even look slimmer ! :busted:

Looks big and clumpsy ! The 2009 even look slimmer ! :busted:
Classic "sour grapes" right there. :thumbsup:

A very nice FI system that monitors its self. Thats what iwas hoping for. Unlike the half ass open loop KX, RM, CR 450's

Looks awesome in all respects but I'm wondering if the heat off that exhaust header will be a problem.

A very nice FI system that monitors its self. Thats what iwas hoping for. Unlike the half ass open loop KX, RM, CR 450's

Where did you see that?

where are the test ridEs???!!!

What do they mean by "pent-proof" when talking about the valves and head?

Where did you see that?

On the Yamaha page under "innovation" it tells a little about the battery less FI system

What do they mean by "pent-proof" when talking about the valves and head?
What that term means is that the combustion chamber shape is like that of a simple single-ridge roof on a rectangular building.

It looks like you'll have to take the tank and seat off to clean the air filter,:busted:

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