This has been going on for six months and it's getting old.After sitting three days without being started my 03 Cannibal has an upper cylinder full of oil which prevents the engine from turning over.The only way to get it started is remove spark plug,spin engine over blowing oil all over the place,put it all back together and start her up and listen to everybody laugh at the smoke cloud that results.When the smoke clears we are ready to show em the *** end of a really good running quad.Has anybody had this problem and been able to cure it?

 

I have not had this problem but a temporary solution would be to drain the oil out of the engine if it was going to sit for a while. Of course you would have to be dam sure to put a note on the bars or something so the next time you start it you refill it. Its just a bandaid but is easier than ripping the quad apart and making a mess.
I have seen some threads on cannondaleriders about the same problem. Are you sure you are draining all the old oil out of all 3 drain plugs . If you could let it sit a couple days and measure how much oil comes out of each drain and I will compare it to mine(fluid ounces) I believe oil is coming past the ring gap from to much in the crankcase. The question is how is it getting there from the frame spars.
Is oil coming out your air filter box at all. This i know from experience is overfilling . Take the dipstick out while draining and let it drain for at least ten minutes. I even tip my quad to the right to get every last drop out of the crankcase.

I will investigate this further .

 

Thanks Wistech,As you might imagine,I've tried all the above.I even let the oil drain overnight.Sometimes I sit her up on her *** and crank it backwards with a socket letting the oil run out the exhaust pipe.Messy but sometimes it is the fastest way to drain it out.My friend's Blaze did the same thing and he swore it was valve guide seals.His all of a sudden stopped doing it and we knew that was not a cure.Dig deep,I'm stumped![img]i/expressions/face-icon-small-disgusted.gif[/img]

 

If you get oil in airbox you need to drain oil as well as the oil hose on right side of motor. This is what helped me.