Thanks guys for the help!
The noise isnt getting louder as the rpm rises.
And yes I only hear this high frequenc ticking while Im cruising with road speed (50-60kph), thats around 4500-5000rpm.

Yesterday i checked the bike's charging, after I warmed up the bike, and let it idling the charge was around 12,6-12,7V on 1400-1500rpm idle. (Without lights)
With lights it charged around 12,4-12,5V, if I revved the bike it was around 13,5V at ~5000-5500 RPM.

It's way too low, now Im trying to figuring out how to check the wires. (Maybe just a burned wire or connector I dont know.)
I wont able to check the generator without removing the sidecover, but I will let this for my mech at the next weekend. (I dont really want to change oil just too take a look at the generator then put back the sidecover and fill up with oil again.)

The interesting thing is that I've never heard about a 250 Hyosung that has / had anykind of charging issues....


If we have to change the generator should we change the Regulator/Rectifier too ?