Had an issue a few weeks ago with my 02 Bayou 300 sputtering and bogging in low rpms. If you gave it enough gas, it would come out of it and ride fine but it seemed to sputter and bog going uphill and starting out. I changed the spark plug and there was nothing overtly wrong with the old one (no oil, not caked with crud, not white). But it still bogs and sputters. It was fine for about 15 minutes. I took it for a spin and all was good but it started doing it again. I don't know a ton about these bikes but i'm handy with a wrench. If anyone has any suggestions I would like to try them. Thank you in advanced for the help. If you have any more questions, I will answer them.