Came back from a ride this afternoon and found that there was a bit of white smoke coming off my header right after the bend where it meets the cylinder. Also there was a soft hissing like releasing pressure that lasted for a few minutes after the bike was turned off (not the fan). FYI: A few days ago I refilled the coolant after cleaning the oil screen and had the valve cover off to check the clearances. My thoughts are that it might be one of the following: Tank venting issues, coolant leak, vacuum issues, faulty thermostat. Any thought would be appreciated.