Im having a problem with my 91 cbr 600, i took the gas tank off it so i could get it painted but when i put it back on the bike runs like ****! Is it suppose to not have a fuel pump? Before i took it off the bike ran awesome... It may just be that the carbs are clogged up. But my real question is, is how is the fuel set up on the f2's? The petcock has a place for the gas and it has another place for another line? There is a vacumn line that seems to come out some where near the first cylinder, but it is unplugged and i dont know where it goes... If someone could help me out with this problem it would be great!