Hi guys, first post so I am new to this so any help and advice would be greatly appreciated. I am a fairly new rider, been riding for a year or so and riding a ZX-2R. Now my issue is, it has developed a distinctive knock in what I am assuming to be the engine area somewhere. Sorry to sound vague. It is a bit worse on initial cold start up and although gets slightly quieter, and I mean slightly, it is gradually getting worse ever so slightly each week. I am planning on taking it in for a service but it would be great to know your thoughts and experiences on this, if any of you have experienced it before. Quick details if it helps, a 93 ZX-2R, done around 27,000kms. No mechanical defects to speak of except the one I am asking about Hope someone can help!