I have had my 2013 Sportsman 500 HO for about a year now. Bought it used with about 500 miles on it and about about 50 hours. I have run it hard, and I am now at 750 miles and about 95 hours. I have not had too many issues with it until recently. Started running very rich and burning through gas. Pulled the spark plug and it was black. Air filter was clean. I am thinking I just need to find a way to adjust the jetting on it. Any suggestions would be awesome, thank you.