A new CCT manual or auto is a good first start, but you got no idea if thats your true issue or not. Might fix it, might not. It's cheep and seems to be common from what I can read with srads and allows you to get your hands a bit dirty. And since your hands will already be dirty doing this.... take some time and inspect your bike, download the manual, crack into it and check everything that is said to be routinely checked or inspected. There is a whole section on trouble shooting a noise and possible solutions and how to do them.
I'm procrastinating doing the very same thing. A co-worker told me its normal, he used to be an motorcycle mechanic before he joined the mil. I do not believe him that the noises I hear is normal or optimal running condition. Eventually I will resolve it, likely this winter. But I feel safe driving my bike to work and back, knowing full well my front wheel is warped.
Another weird rattle I had in the 3-6k rpm range was my chain when I first got the bike and had no idea bout 1-2in play. I would start off scared to even be on the thing not giving the bike enough throttle in the friction zone and the bike would shutter and this incredibly loud rattle would freak me out.. it was the flippin chain bouncing around on the swing arm.
Thanks and Regards,