[Danke]

Want more fun,,,,,,,?

Most carb stix aren't calibrated so you need to check them.

Connect two of the gauge lines to one of the bikes vacuum taps at the same time, they should read the same.

The reason they do not is the glass or plastic tubing that is used is not the exact same dia in the ID so they read differently.

 

[Danke]

Could be a bunch of grit and grime in there now, looks like you've got some sort of old ZX-6, have you checked around to see if there's a dedicated Kawi forum in North America or the UK?

Could also be the idle mixture screws (if it has them) Maybe turned in so it's not giving enough fuel/air to stay consistent. Of some other carb change that's not allowing the idle circut to function properly.

Probably time to pull that bank of carbs, clean and inspect them, make sure they have all the right breather hoses hooked up, all the jets and needles are OK etc. Heard of one guy who put in a kit, and the needles hadn't been machined properly.They vibrated during use and milled out the mains so you couldn't do anything but pony up for new carbs (ZX-9).