Mine won't stay running lately either, it idles very low (around 500rpm) and will die eventually if I don't apply any throttle. It also has a fairly rough idle. I thought it might be fuel since I haven't ridden much in the past few months and the battery has died a few times but it has a fresh tank of 93 and still does the same. Are there any good tests for what to check for? I've already tried the exhaust runner test and all stay uber hot at idle.