Join Date: Apr 2015
Motorcycle: 91 gsxr 711,2002 Gsxr 1000
Re: 95 gsxr 750
First thing I would do is check for a vacuum leak. hard starting and backfiring can be caused by a lean fuel mixture.
When you get the bike running spray some carb cleaner around the carb boots, one at a time of course. If the motor increases in revs you have a vacuum leak.Tighten or replace the boot.
Also check the nipple and hose on number 4 boot that supplies vacuum for the petcock for cracking or leaks.. I had problems with a broken nipple in the past and was getting the same type of symptoms you had.