Hello, I’m currently in a big conversion project of my Kawasaki Z 550 Gt (Bj. 88) and wanted to ask a few questions about my air filter box. On the one hand, the optics of the air filter system and the size disturbs me because it occupies relatively much space. Since mushrooms and any kind of open air filter are not allowed, or are connected with expensive DB measurements, I wanted to ask if and to what extent it is allowed me to change or construct my air filter myself oh If I put the air filter in a smaller box, which I attach directly under the seat and from which 4 large hoses would run up to the carburetors, would that be allowed or harmful to the engine? What else would I have for possibilities to empty the room behind my carburetors, how did you do it – if you did it? I would thank you already in advance!