Too much Oil
#1
#2
Sure it's not getting too much gas?May need a new needle and seat/carb kit? Oil pumps,unless the adjuster cable has been messed with are pretty well set from the factory at around 50-1 ratio.If in doubt look at the oil pump lever. It has a small index mark on the lever that aligns with the one on the pump body at idle. Too much gas can cause a lot of excess smoking,fouling plugs, same as oil can. Plus I'd check compression to see if you're at a minimum of 120 psi.