I have a noticeable surge in RPM at idle during warm up and after the bike is up to running temperature. This does not happen during cold start when the fuel enrichment valves are in use. Once the fuel enrichment is closed it will start the surge. Where do I start troubleshooting this issue? The air and fuel filters have been replaced within the last couple of months and still appear to be in good condition. This is only a 20 to 30 RPM thing but is noticeable and cannot tell if it is on the right or left side or both. Other than this annoying surge it runs great and am getting an average of 40 to 42 miles per gallon. I am thinking this is something simple but need a starting point and some wisdom from the forum. Much thanks in advance.