I have this '86 that I finished up getting back to running shape that had been setting for over 4 yrs. Now that I have it running, I noticed that when I state the bike sometimes after it has been sitting for a day or so I get a small amount of white smoke when it is started. The bike has only 39,000 miles on the clock right now. I am only getting about 39 mpg. Yes I did the carbs and have set them twice. Is this white smoke from water and how bad of a problem do I have? The bike runs real good and starts up with no problems.