1991 CBR600 F2, when the bike starts up I hear a Metallic Buzzing/Rattling from the right cylinder head. When riding the sound goes away and once the bike is hot it stops. If I let the bike sit for 30 min or so the sounds comes back on startup.
It sounds to me like a Valves ? ( I'm no mechanic ) Maybe it's stuck ?
Is that bad ( park the Bike Now! ) Or will some general maintenance clear it up ?
Any Idea's guys ?