was riding my 2002 TRX450FM yesterday and 3 times it wouldn’t take the throttle , it would bog , pop , spit , back fire and people behind me said it was blowing black smoke when it was happening , it would clear up and everything good for a while and then do it again , last about a minute then it was ok for 10 minutes —–so I put a clean container under the carb drain hose and drained off a few ounces of gas and it was clean , no water or dirt , took the garden hose and wet every inch of the bike with the motor running and couldn’t get it to do it again —– a little history of the bike , it has about 25 hours or so on a rebore , piston and new carb , any ideas