After pushing my 600lb 1988 cbr 1000 for about an hour four blocks up a steep hill to my house, I feel like either complaining, dying of exhaustion or getting an answer so I will try for the latter.

A few days ago, I removed and cleaned the carbs, then afterwards it started to bog down when it was hot. I was told to sync the carbs and I did so using a twinmax, It just got worse. I decided to check the plugs and they were terribly fouled. I replaced them and it ran better than ever... For a few miles.
When I was riding I felt a little bit of gas on my right shin and then it died, couldn't even roll start it. So here I am, puzzled and tired as hell. I found where is was leaking from though. Here is a pic:

Thanks All!

 

Check your fuel pump is operating
Check that fuel filter isn't clogged

 

Are the plugs fuel fouled or oil fouled? If fuel fouled suspect carbs flooding.

And, is that line a vent line or a fuel bypass back to the tank? I'm not familiar with the '88 and don't recall seeing anything like that on my '91. If it's a vent line that's dribbling it again sounds like the carbs are flooding.

Check the float height, make sure the float valves (also called needle valves) are seating properly.

 

Yeah, I think you guys are right, carbs flooding. I pulled off the spark plugs and it was soaking wet, then tried to start it and see if I got a spark and I did, but it shot a crap load of gas out, so maybe the float level is too high? I check it out.

On a side note, any of you know about cooper dirt bikes, my neighbor gave me one, but I don't know how much oil to put in the crankcase. Anyone know? Thanks

 

I pulled off the carbs, and the #4 cylinder intake was totally filled with gas, I disassembled the carbs and cleaned them out and made sure that the float valve needle was properly seated and put them back on, it start right up and ran for a few minutes, then it died. I tried to sync the carbs but it wouldn't stay going long enough for me to do so. You know what is going on? Thanks.