yz400 motor in 400ex?

[yamablaster24]

How hard is it? I have local company (atv four play) that will do it for 600. Motor is 750. Carb and wiring 400.
how much power compared to stock 400ex? Compared to 450?

[ss440ex]

$600.00 is a good price for the conversion.
You will like the new power.

Is that with
kicker ext
air box
exhaust
oiling system
radiator,also?

[ommkevin]

since thats a 2 stroke it will go really fast that is so much cheaper that a 400 EX and 450r good deal

[FoxMxRiders]

Originally posted by ommkevin
since thats a 2 stroke it will go really fast that is so much cheaper that a 400 EX and 450r good deal

Yz400 is a 4stroke if I remember correctly

[hondajoe05]

ya i think he meant yz450f cuz i haven't heard of 400 but i don't no a whole lot about dirtbikes........my .02cents

The yz400f was the first fourstroke motocrosser, doug henry won the first fourstroke championship on it in modern day MX. There was the yz400f, the yz426f, and the yz450f.

[ommkevin]

oh sry i just saw yz and i thought 2 stroke whats the diff between the yz and the 400