hey im new here and new to quad work as well so i need some help. i have a 1998 polaris xplorer 400l i just got it and the guy told me he thought the oil pump wasnt working but he said it ended up working fine so it was smoking at the time of purchase due to the excess oil being burned since he had put mixed gas in it thinking the pump was broke. it made sense at the time so i thought nothing of it. filled the tank with fresh gas cleaned carb and got it running good as before hand it would die at an idle.the smoking went away significantly but not all the way. i took it out riding and about 20 30 minutes into the rides it dies. starter wouldnt turn it over or anything i tried the pull rope and it was locked as well. i went to get the truck and by the time i came back it was free again but still would not start. took it home and it sat for a week i went out charged the battery and it started again and has been since then just havnt been out riding again only around the yard for a couple minutes of run time. any ideas of what im getting into?