Hey guys, what's all involved in replacing the valve guide seals? I went through the old posts and am a little confused. Do I need to do any machining or can I just pull the old ones out and replace. Is this something a at home do it yourselfer can do or do I need a specialist? The service manual basically states remove the seals and replace, a friend says they need to be reamed. 98 FE 600. Thanks!