hey guys, I have an old DT250 that i just got running smoothly today, runs good, starts on the first/second kick, it has been sitting for 20 years..I put about 4-5 ounces of oil into the gas tank just to make sure its lubing, good news is the auto-lube works. But it smokes like crazy, is this just because of the oil in the gas tank or is it just from sitting 20 years and needs to burn off all the crap? I was thinking the mix is set to high on the auto-lube system? any ideas?