If you don’t have a program on your lap top, what were you looking at all day at Sears while the rest of us were thrashing? :) Yes I’m staying with the 250, and getting a 125 for practice! Larry ,all I know about the Dellorto is there’s to many things to change for my pee brain. I like my Mikuni ,once I got the float level set it’s been good. I know you have a 257 which is a higher level race engine ( I am hoping the club will allow some rule changes so the CR guy’s can compete on a level playing field,that EVO barrel above would be a nice start) so not sure how it would work for you.