Put in way too much oil, drove home (40 miles), what did I break?

[number9]

 Here's the story...

I have a 2005 GS500f, I am the original owner.  it has about 16,000 miles on it.
I've dropped it twice, once in 2006 avoiding a car, once in 2008 I ran into a cat crossing the road going like 5 mph.

Ever since the first time I dropped it in 2006, it has had an oil leak near the top left of the oil cooler, not sure why, tightened everything, still leaks, oh well.  I took the cracked fairing off, and have just been wiping off the oil and checking it occasionally and filling it as needed, which wasnt the greatest idea, but hindsight is 20/20.  I had it garaged for like the last year, and recently moved.  I was riding it to my new house when I noticed (or imagined) it was getting super hot, so I stopped and checked the oil.  It was running fine and normal, but the dipstick was bone dry.  I freaked out and thought I was going to melt my engine or something, and put 4 liters of oil in my bike.  This was an extremely bad idea.  I know now that the bike only needs 3L when dry, and hell, it probably wasnt even dry when I did that.  Anyways, after drowning it in oil I drove 30-40 miles.  My girlfriend was following me and I could only get up to like 40 MPH.  The bike started pouring smoke out of the exhaust so thick that she couldnt see, and I pulled over.

I have now drained and changed the oil, filter, and replaced the entire leaky oil cooler. The bike smoked for awhile the first day, but does not smoke anymore.  It is driveable now, but will not go any higher than 7-8000 PRM.  It drives and accelerates normally until I hit 7-8k, then it acts the same way like when its running out of gas, you know choke, sputter, lunging forward.  I can drive it around town, but on the highway in top gear it will only go about 70MPH full throttle.  Its almost as if the throttle flattens out 3/4 of a turn.  and if Im in neutral just to see how high itll rev, it doesnt even make it near redline at full throttle.

I know this was a totally stupid thing to do, give me some crap if you must, but Im trying to figure out what Ive jacked up and how to fix it.

One thing I was thinking might have happened is oil got into the exhaust pipe and is doing something weird.  Dont the exhaust pipes have some sort of baffling paper in them that muffles sound and captures emissions?  could that be the problem now, the paper got oil soaked and is restricting my RPM?

Any and all suggestions are welcome, Ive got a crippled bike and a retarded rider.

[kml.krk]

I hope that no one bashes you. Most of us do stupid things once in a while.
Exhaust have no baffling paper. Instead there is fiberglass wrapped around the baffle to make the exhaust quieter.

Unfortunately, that is all information I can provide. I am sure that some more educated person will chime in soon and give you more information about what may be broken etc.

Best of luck to you!
KML

[the mole]

Not sure what you might have damaged, but I'd suggest a compression check as a good cheap start to the diagnosis. There would have been an abnormally high load on the crank, conrods and pistons as the oil would have been forced rapidly from one side of the motor to the other by the motion of the pistons. Obviously the carbs and ignition system would be OK, and I can't see how the valves would have been affected.
Basically  , but good luck!

[black and silver twin]

the PCV system probobly put a ton of oil through the carbs, the slides and/or jets may just be gummed up and unable to move all the way. ide clean out the carbs, clean the plugs and look at the filter.

I had a seca 650 that the PO put 6 qts of oil in, he said that he though you should be able to see the oil through the fill hole! 
any way it had the same problems after putting in the correct ammount of oil (3qts), but cleaning the carbs, replacing the plugs and replacing the air filter fixed it. the pcv system had pulled at least half a quart through the carbs in the 25 miles I rode it home.

[Homer]

I ran into a cat

There's your problem.  I hit a bird once and had to buy a new battery. 

[jeremy_nash]

in the stock muffler, there is a series of tubes going back and forth into different chambers. not even any fiberglass to soak up the oil.  

my wife did something similar on her toyota corolla, and it was like a smoke screen behind her. i did an oil change on it and drained out 2 GALLONS of oil!  had to replace the plugs, as they were really ashy.  

since you used miles, i will assume you are in the usa, so get some plugs from advance auto, and that MAY be your whole trouble.  and also, dont check the oil with the bike on the sidestand

[number9]

Thanks for the suggestions everybody, Ill go thru and check this stuff as soon as possible, and let you know what it was.  Id like to think Im not the only one whos ever done this.

[tt_four]

As far as the general problem, it sounds like with that much oil there was so much pressure in your lower end that the oil forced it's way past the pistons and into the cylinders. It then combined the the air/gas, burned up, and went out through the exhaust like everything else that runs through your motor. The bit about it going back into your carbs is over my head, but if that's the case I'd start with a good carb cleaning and possibly some new spark plugs. If that doesn't fix it there's a chance you may still have a blown gasket or something along those lines inside from all the oil pressure.

Filling the oil as you go is a dangerous fix. I did the same thing on my last bike, which is known to have an oil leak through the breather cover/hose if you drop the bike on the right side, which I did. The dealer couldn't fit me in for a week or two so I just kept replacing oil all the time and riding like normal. Eventually by the time I took it in just to have the stupid gasket replaced, I had to have $3k worth of work done to replace the crankshaft and various other things. Thank god for warranties! 

[kman]

Take a look at the spark plugs.  I would imagine they are all covered in oily fouling and you may be running on only one cylinder or running very poorly on both.  Hopefully the low oil that prompted the problem in the first place did not cause any problems.

[Twism86]

Ill throw another "check the plugs" suggestion your way. Years of running dirt bikes has taught me to check them first when your running like $h!t, and a fresh set can do wonders. I would bet they are oil fouled. I dont understand how oil can get to the carbs, but cleaning cant hurt.

[pandymai]

if youre running stock setup, there's an overflow tube coming out of the valve cover. that tube flows back to the stock airbox. oil couldve been pumped so high and hard that it flowed out through the overflow tube, into the airbox, and was able to be pulled back into the carbs. (the overflow is generally used to let leftover exhaust/gases that escaped through the valves to circulate back to the airbox to be sucked back in to further burn it).

just being a bit informative =P good luck

[black and silver twin]

PCV stands for Positive Crankcase Ventilation, it puts excess pressure/oil through the intake after the filter so it can be burned. If there is way too much oil it will flood the intake box and coat the inside of the carbs.