Alright, ive been running my 93 Polaris XLT Special 580 every couple weeks this winter and its been running pretty good, but first it doesn't seem to be getting enough air (sometimes i have to ride with the choke on half). The other day though, i was pulling into my driveway (luckily) when i heard this really loud POP come from the muffler and the throttle kept going though and so did RPMs way up but it stopped moving then promptly died. I tried to restart it but nothing happened so i pulled the plugs and for one in particular i pulled it out and either heat that froze or smoke can flying out, it wasn't the middle one though. I went back today, it started up pretty nicely then i hit the throttle it pulled forward then died again. The same plug smoked again and the color residue on it was a real thin almost black liquid, i'm assuming that's normal due to the mix of gas and oil? I tried to start it again and heard the loud POP again and at that i left it alone in case the bearing or something is blown out. Does anyone know what could be doing this? Do i just need to clean the carbs or what?