Hi and Welcome.
As a new owner of a Gen1 Fazer Thou you should bookmark Pat's site - http://www.cartestsoftware.com/fz1/
I think you should be looking at the Exup valve, it may be loose cables as Nick suggests or worn / missing parts, as this area is often neglected / bodged. Give the valve a strip down and service and see what you find - http://www.cartestsoftware.com/fz1/exupmaintenance.html
Another place to check would be the front fairing infills and wiring in this area, it is a common issue that these will develop a vibratory buzz / rattle just after tickover speed. A lot of owners apply self adhesive foam strips to the edges of the infills to prevent this but finding the exact problem area can be a bit hit and miss.
Either way I really wouldn't worry too much, these bikes are pretty bulletproof as long as they have been given basic care.
As a new owner of a Gen1 Fazer Thou you should bookmark Pat's site - http://www.cartestsoftware.com/fz1/
I think you should be looking at the Exup valve, it may be loose cables as Nick suggests or worn / missing parts, as this area is often neglected / bodged. Give the valve a strip down and service and see what you find - http://www.cartestsoftware.com/fz1/exupmaintenance.html
Another place to check would be the front fairing infills and wiring in this area, it is a common issue that these will develop a vibratory buzz / rattle just after tickover speed. A lot of owners apply self adhesive foam strips to the edges of the infills to prevent this but finding the exact problem area can be a bit hit and miss.
Either way I really wouldn't worry too much, these bikes are pretty bulletproof as long as they have been given basic care.