Got a bit of a problem. Noticed the chain was a bit too slack on my 2000 model VTR250 last week, so on monday I went through the motions of adjusting it, for the first time. Service manual in hand, managed to keep it aligned and set it all up, tightened correctly etc. While I had it all set up and the tool kit out I also got the front sprocket cover and chain guard off and gave it a clean + relube. Now there's a knocking, or ticking noise coming from either: the chain the front sprocket or the shaft connected to the sprocket ive measured the slack and its sitting around 27-28mm, manual says between 25-30 so that should be right. I can only think that I got overzealous when cleaning and have shifted some grease on the shaft driving the front sprocket... any ideas?