I agree, they are small. Stock pilot is a 15, and stock mains are 137.5. I bumped the mains down to a 130 to clean the plug up and to try not to choke myself to death while it's warming up in the garage-with the door up. It literally smelled as if the thing was pumping out raw fuel. I am only going off plug color to make my jet changes. She'll only do 115 MPH- 137.5 mains or the 130s, it doesn't seem to make a difference.
Mike