I got my raptor 660 back from a Carb clean and a valve adjustment, After two weeks of driving it around for a short period, I went to go check my oil and the oil was overfilled all the way up to the top and it smelled like fuel. The mechanic did not want to fix it, so I pulled the carbs out and checked the needle and seats and they looked fine and are tight when pushed in. He also did a compression test and was fine. I checked the petcock and it was fine. I don't know what the problem can be?