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honda400ex01aca
03-22-2007, 06:43 PM
how hard is it to put a crf450r engine in a 400ex frame would i have to make new motor mounts?
stalefish_132
03-22-2007, 10:59 PM
this really belongs in the hybrid forum but yes you have to make new engine mounts and mount a radiator inside the frame. there are alot of other things you have to do to make it work right.


here is a link to a thread on what all is involved in doing a CRF conversion. took me less than 2 minutes to find this.

400ex/CRF conversion how to.... (http://www.exriders.com/vbb/showthread.php?s=&threadid=262834)