Hi everyone new to the forum basically I bought a Kawasaki bn125 a month ago for my first bike. After a few weeks of happy riding I initially noticed second gear was loosing power at low rpm (I assumed it was the power band) suddenly 3rd 4th and5th lost all power unless I screwed the engine at high rpm. Long story short I grew some ***** and decided to get my hands dirty removed the exhaust and the gasket crumbled in my hands , (ordered a new one) took out the carb and found one of the jets to be blocked copper wire and a tooth brush seemed to sort that however this is where my newbieness comes into play. I reconnected the carb and realised the line opposite to the fuel line (right hand side if sitting on the bike) I have no idea where it connects too so wondering if you experienced fellow had some tips or advice for me can put up pics if needed thanks for reading through

 

It sounds to me like it is a vent tube. It shouldn't connect to anything. Tip the bike to that side and check for fuel running out. This hose and vent is to help prevent engine flooding in a tip over, the hose just carries it away from the hot engine. There is usually a small loop of some kind to feed it though to keep it in place.

God luck