Hi, Im new to this site, all the way from New Zealand. I bought an xs650 special 1978, it has done 19,000k's since new. I have recently chopped and hard tailed her, The build is basically finished, Using the original wiring loom it has now been re wired with a few bits changed to the loom, Before the chop the bike started first pop. I have a new tank and am running one "on/off" petcock that T's into both carbs. Original tank had a petcock with prime on each side feeding both carbs separately. Im running k&n air filters. What do I do with the two lines that went from the petcock prime to the engine/carb? What do I do with the two breather lines that went from the top of the engine to air box? I have new spark plugs and occasionally the engine will back fire, but wont actually fire up, the spark plugs are practically bone dry when I check. What would have changed with the carbs before and after the chop to make the bike now not run? Thanks!