Unknown carb part in 1987 zx600rx
 

Hi,

I was taking apart the carb on a 1987 zx600rx and ran into a piece connect to carbs not in manual or parts store and something I have never seen before. Basically this connected to the bottom of the carb by tubes (one for each carb. The long end went into a hole in the airflow gasket connecting air box and carb. I have no idea what’s this is and haven’t seen it on another bike before (granted my first old sports bike to work on). Any ideas?


https://cimg6.ibsrv.net/gimg/www.kaw...cdbd14b24.jpeg

https://cimg8.ibsrv.net/gimg/www.kaw...caa380c56.jpeg
Just want to add it looks like these were connect to the carbs drain plug but plug was replaced with a nosel… no idea what’s going on here ha
https://cimg1.ibsrv.net/gimg/www.kaw...97e1b234e.jpeg