I have an 02 FLHTCI with 22000 miles. I get black smoke when I rev it up and let off the gas...I'm not talking about overly revving the engine, I mean around 3000 rpms or so. I always thought that black smoke means its running rich...it is a stock bike. Also used about 2 1/2 qts of oil on a 2000 mile trip. I also notice that my oil seems to get real dirty after about 500 miles...I bought it with 16000 miles on it, and have changed the oil every 3000 miles or sooner because I was trying to clean out the crank if it was that dirty. I ready to burn the thing up!