I just picked up a Funco Motorsports tube chassis built Teryx. I was having a hard time starting it, so I pulled the dual Keihin FCR 39 carbs off to rebuild them. When I removed the jets, one had a 152 main jet and the other had a 155 main jet but both had 52 pilot jets. I called and spoke to Keihin FCR and they said possibly one of the cylinders were bored out more than the other. Anyone have any suggestions? Thanks in advance!