Quote:
Originally Posted by JabezStone
FALSE ALARM! 
So, after some forum searching I suspected the issue was a CCT rattle, and just pulled, cleaned, and reinstalled it... and noise is gone! It sounds amazing now. 
Good info on the ninja250 wiki, along with a nice (but oooooold) walkthrough video here: https://www.youtube.com/watch?v=E4eH0d2E73g |
That video is great
I had a similar cam chain noise the other week (after the bike sat for a while) and started to go down this path myself. Thought for a few minutes before busting the tools out and fired it up again: oil warmed up and the CCT clicked out a little more. Noise gone. Oh well, I think I'll clean the CCT later!
I was outta Mtn Dew like Travis had in the video, so I wasn't prepared anyway.