It seems that you were not destined to be the first human being in history to run a bike 1,376 miles without some maintainance.. We will have to wait for the Chosen One.
Try reading and following FREDs GUIDE and give the bike some overdue attention. If, after it's been tuned up and the problem continues, come back here..
Carb cleaning hints can be "Searched" in this forum (use the Search link above). There's no easy or fast way to clean a carb properly. Trying to do it an easy or fast way always seems to turn out to be more difficult and to take longer.