Hey guys, I have a carborated 03 ski-doo rev that I just bought from some one I know for a great price and all it needed was new reeds and boots b/c the old ones were shot. So not wanting to sieze the engine I didn't run it until I put the new boots on but after I did I started it up and it started backfiring around once every ten seconds when idling and once every five seconds when I rode it. So I took the exhaust off and come to find out there was a-lot of oil coming out the Y pipe. What would you say is wrong here could it be running rich? Any help is appreciated.