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View Full Version : Yz426f engine in 250r or 400ex



BlackRaptor
08-13-2004, 06:33 PM
What do you guys think of this. I have seen it done any input on how to do would be great. Any reason why it won't work. I'm talkin about using the stock frame just to clarify. And where can I get a kick start extender? Thanks Pics would be awsome.

NTPracing22
08-14-2004, 07:09 AM
there's a few 'how-to" threads about how to do this with a 426 and a crf, try doing a search

ex kid
08-14-2004, 02:59 PM
a guy that races at a local track here has a 400EX to YZ 426F East Coast ATV conversion. the motor mounts look factory. the only thing that seems to suck is that every time he has to start the quad he has to lift the rear fenders up to kick it over. BTW i would look into the YZ 450F motor. easier to start and most of the older bike motors have had the **** beat out of them thats why you find them so cheap. i think the toughest part of the project would be mounting the rad and making it fit with an oversized oil tank.