Motorcycle Repair: Fourwheeler, oil hoses, oil return

Question
What does it mean wen you got oil in the box that your air filter is in??

Answer
That the bottom end of your motor had to much oil in it and your breather system pumped it into your air filter. The oil could get there from a weak check ball on your oil pump, or loose rings on your pistons to restricked oil return system ; plugging up oil hoses or plugging up oil filter.