Foreman Other Atvs

My ATV Is blowing thick smoke from exhaust and also leaking oil from the exhaust.?
Well. i have a Honda Foreman S 450 4x4 and its continuously blowing Smoke from exhaust. its also leaking what looks like Oil? im new to ATV's so i have NO idea whats going on.. It was running yesterday (Still blowing smoke) but after about 30 mins. of riding it, we killed the engine and it wouldent start. i've been looking at it all day and i managed to get it started, but it wont run unless i give it gas. once i try to let it idle, it kills. i was thinking maybe the spark plugs had oil on them, and the oil wasent letting it ignite but i wanted to get some other opinions before i mess anything up. if any suggestions, let me know what it is, and how i would fix it. i greatly appreciate it. Ohh and i never tipped the ATV over.
If your engine oil level is right then it sounds like you need a top end rebuild.
honda foreman atv tunes getting wet