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hybrid question
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Posted by: Wanksta

has anyone put a crf450 or a yzf450 engine in there 400ex? i am thinking about it and have some questions. like how much mods have to be done to the frame. and how much will an engine go for? thanks

Posted by: motochamp250

try a search this has been discussed thousands of times...i think some guy even posted a step by sstep on it if im not mistaken.....