has anyone done the 69mm bore on the 250
if so how did it run, was it worth it
any info would be great thanks

 

I have not ever ridden one but I have heard that they are awesome. I know of one that is for sale for $335 plus an exchange for you stock 86 cylinder. It is ported and the guy knows his stuff. You might have heard of him www.macdizzy.com check out his website.