I am also interested in what to do with the black airbox, as I ned to change the fuel lines on my 91. I have a related question, what size fuel lines go on this bike? 3/8"? or is it a metric size line? I had a fuel line crack the other day, I sliced off the end where it was cracked, and put it back on to get me home, but now I'm thinking I should really replace all the fuel lines coming off the tank into the carbs. There were no clamps on the lines, they are just pushed onto the petcock. Should I put clamps on? and what is the correct size fuel line so the size is correct?
And, how do I remove that black airbox so I can reach down to the carbs and replace those lines?