Does anybody know what kind of mods you have to make to a 300EX moter in order to fit a 350X head on it. I already know about the exhaust I mean to the case or the bolt holes. Thank you for you help.

lbz300EX or maybe soon to be lbz350EX

 

Just get a 350x. A stock 350x will spank a moderately modified 300ex. I have a 350x engine on a 300ex frame. I don't think a 350x head has the same bolt pattern.

 

I heard that it bolts right on a 300EX bottom end. Except I think I remember something about the cam spinning the oppisite direction. Just my thoughts

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Y2K300EX

2000 Honda 300EX

1988 Quadsport 230