Motorcycle Repair: too much oil, screaming eagle exhaust, bike mike

Question
QUESTION: I have a 2005 XL1200C with Screaming Eagle exhaust. I changed the oil
recently with no problems, refilled with 3 quarts. The oil level was at the top
of the mark, but figured it would go down. I've ridden a few hundred miles
since, but last time I took it out it rode a little rough, idled slowly, and finally
began to smoke from the air cleaner and died. I drained the oil down to mid-
dipstick, but it still smokes and won't stay running. I removed the air cleaner
cover and filter. The filter is dark and the backplate is a little oily in places. I
assume the air filter needs replacing, but I am worried about the carburetor.
Do I need to remove and clean the carburetor? I am inexperienced with
mechanics, but would rather learn by working on the bike myself. Any
thoughts or suggestions are greatly appreciated.

ANSWER: Does it run with the air filter out of the bike?
Mike

---------- FOLLOW-UP ----------

QUESTION: The engine is sounding much better now without the air filter. I am in the
process of cleaning the air filter. In the morning I'll replace the filter and try
running it again. Where would the access oil go after running the bike with too
much oil? It seems to be burning off. The carb and exhaust are not smoking like
they were.

ANSWER: To much oil would pop out the dipstick and run out the tank
Mike

---------- FOLLOW-UP ----------

QUESTION: Thanks for the responses Mike.
The air filter is now clean and back on the bike. I replaced the spark plugs as
they were clearly carbon fouled. I adjusted the choke to be sure it wasn't
somehow allowing enriched fuel in even while closed. After a short ride I
checked the new spark plugs and they were already dirty at the top of the
thread. The bike is running much better, almost as good as it was before the
problems began.
There are two things I am now thinking may be going on. The first is that the
bike now has Screaming Eagle oil, which I'm sure was not in it before, and the
two oils do not mix well. The second is that the carb was not re-jetted
properly or re-jetted at all after the installation of the after-market exhaust
system. I did read on-line that oil spillage from the air cleaner is a common
problem on Sportsters, and I admit that I did ride the bike harder than usually
the previous ride before the problems began.
I just ordered Amsoil 20w-50, which I will change the oil with as soon as it
arrives. I've learned a great deal in the last few days. Thanks again for the
help and any thoughts and advice you may have. Best. Matt.

Answer
Unless you have oil leaking past the rings or past the valve guide oil seals, it is not your oil that is the problem. Carbon fouling is not from oil, but from to much fuel or not enough air. I can also be from a weak spark. Your jetting could be correct, but you coil and plug wire could be weak causing the fouling.
Good luck and happy riding
Mike