426 VS 400 transmission, are they the same???

I am rebuilding my 2001 426 transmission due to a bad 3rd gear. The others are not too hot also. I have found a set of gears from a YZ400f (98-99) that appear to be good. I was wondering if anyone knows if they are the same as the 426 gears? If not, will they fit? Not a good swap???



400 has different ratios, ie closer, but will interchange if the gears are swapped in pairs although the effect of changing the gearing will need researching for your application.

First and Second gear is the only difference. 400 use a closer ratio ,3rd thru 5th is the same gears

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