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Can the pilot screw make up the difference between say a 40 and a 42 pilot jet? My 2007 T100 has always been a hard starter when cold. I currently have 40 pilots 3 1/8 turns out. I was thinking about going to 42's. Bottom line, does a 40 at say 3 1/8 equal a 42 at say 1 1/2 turns out? (Just a rough comparison) Or is it more complicated than what I am thinking?

Thanks
Mike
 

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My rule of thumb is that if one has to go out more than 3.5 turns, it is best to go to the next size up on the pilot jets. I am not sure you will find much difference with "starting"....running after starting may be a better indicator. I always start mine when cold with the choke (enricher) full on and NO throttle. Outside temp tells me when to move the choke to 1/2 and 0.

My 790 starts and runs (idles) much better w/o the airbox.:D The only other time that it started and ran at idle as good was when I had header pipes w/o the crossover and very open silencers. With that setup I ran 45 pilot jets, but once I replaced the headers with ones that have the crossover pipe, I had to reduce the size of the pilot jets.
 
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