[Krankasaki]

Thx for your replies. Hope its the fuel pump(not so expensive i hope? )

Last month before the welding the bike was riding perfect. And now after rebuild this suddenly is. The tank has been in my shed the whole month, maybe the tank putted pressure on the fuel pump? Or dirt or something got in?

But is it possible it could be and ECU thing also?

Take it a step at a time as to not overwhelm yourself.

Test the fuel pump, which I doubt will be expensive and take it from there.