I am new to this site and hope I am correctly posting this. I have a 2004 Outlander Max XT 4X4 and every time I ride it, even for a short time, the spark plugs becomes sooty, not tarish, but sooty. If I shut it off and restart it, it starts hard. If I put in a new plug or clean the old one it will start right up. The air filter is clean and there is no obstructions in any part of the air intake system. I am not able to find any way or any type of carb adjusting screws. I am assuming that it needs more air to the carb, but I don’t know for sure. Would appreciate any ideas. Thanks, Kennyjll