I have a 1981 550 maxim. It has been sitting for some time. I'm pretty confident that the carbs, from sitting, have gotten a little gummed up. I took them apart, cleaned them and have been able to get it started. But it won't idle. You have to nurse the throttle and it very erratic. some times you can keep it going for ten minutes. Sometimes it will quit as soon as the ether wears out. It needs about 3/4 throttle to stay running and at times it will rev up on it's own. Fuel seems to flow freely. I think I have a vacumn problem., but any, ANY, advice would be appreciated.
Thanks in advance,
Marc Smith
Cleveland ,Ohio