Hey guys, ima new member and jus bought a 76 cb550 "bobber". Hope those arent frowned upon here. lol. Everytime I call someone to ask about parts they ask whether its an F or K model. When I tell them I dont kno, they say to look on the VIN. When I tell them there is no f or K n the VIN they say it has to have one. But my bike has no letter in the VIN, whether it b on the VIN plate, or stamped n the frame. Please help me in identifyin my bike so I can tell these guys what I have. Thanks and I look forward to meetin all you bike lovers.