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Message: [QUOTE="halowords, post: 856520, member: 56212"] Just wondering, when does it hurt performance the worst on the current 250's? Also wondering, how close does an EG Mo' Better port job get it to the YZ or RM 250 engines in terms of low-end power and being competative? I'm not planning on racing and I'm relatively new to motorcycles in general so I'm not sure it really affects me too much one way or the other, but I'm trying to decide between an '02-'03 CR250 and a Mo' Better port job, or an '02 CR250 chassis with a YZ250 or RM250 engine transplant for a fun project with my Ol' Man this winter/spring. -Cheers [/QUOTE]