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mofo

Tranny differences

2 posts in this topic

I have a '03 YZ450F with a 4-speed wide ratio in it.

I know the WR has a 5 speed wide-ratio also.

But can anyone confirm the '06 YZ has got a 5-speed close-ratio in it?

or is it similar to the WR gearbox?

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I have a '03 YZ450F with a 4-speed wide ratio in it.

I know the WR has a 5 speed wide-ratio also.

But can anyone confirm the '06 YZ has got a 5-speed close-ratio in it?

or is it similar to the WR gearbox?

The one thing I'll go out on a limb about is that it will NOT be the same trans that a WR has. The WR has a fairly large gap between both 1st and 2nd and 4th and 5th. The YZ426 had within 5% of the same ratio spread from 1st to 5th as the 450 4spd had between 1st and 4th. What I hope, and the rumors I've heard are that the new box is basically the same first four as the four speed (adjusting for final gear ratios), but with one more evenly spaced gear added. That would be cool, and it's what the bike needs. What it doesn't need is the tight-packed ratios of the old 5spd.

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