Vacuum line not connected correctly

Ok fuel fill lines are the 2 lines between carbs 1 n 2 and 3 n 4 toward the rear of the bike the 2 hoses coming out just in front of them are float bowl overflows that just get criss crossed over the carbs and ran thru the little holders on the frame. the only vacuum line is coming out of the side of carb 4, this line goes to the nipple on the petcock facing away from the knob. as for the fill lines the 1 between 1 n 2 goes to the nipple facing the rear of the bike and 3 n 4 goes to the 1 facing the front of the bike. hope this helps here is a link for a free service manual download. http://www.files.michaelmcmahon.org/1988-1997-GSX600-750-1100F-R.pdf try using www.katriders.com it is a lot more helpful than this site for katana issues.

Try here:
www.onlinefreeebooks.net/automotive-machinery.../suzuki/