its kind of hard to tell color of smoke, i just noticed it this weekend. i thought it looked grey/black and smelled like fuel as if running real rich. it smokes even after driving for a while. also smokes a little near sparkplug/header area. i'm baffled. but, when i removed the plug, and cranked it over(with coil wire off) it spit out a bit of fresh
oil. plug was also fouled. its down about 1 quart. last time i checked
oil level was two weeks ago(bout 250 miles) and it was full. there is also alot of black varnish build up in the carberator throat.