I have a problem, my '01 ZX9 has been jetted and has an air box kit on it. The problem is I have noticed when I let it sit for a few days, when I fire it uo it pops out of the muffler like a backfire, I didn't think much about it till today when I had to kick over to reserve with only about 80 miles on a tank! So I figure gas is leaking past the jets in one or all of the carbs evaporating and what little don't evap, is backfiring through the can on startup. I have a great mechanical knowledge (rebuilt MANY Ford Mustang my other passion) but this is my first mechanical go-round with a bike and I kknow everything works the same but I have never worked on multiple carb systems before. I just dont wanna f*** anything up. I was thinking about running some carb cleaner through the gas to hopefully unstick something. Any suggestion?!?!?!?