Mine is getting a little worst, and seems it's moving higher on rpms.I have a rattle as well
First was there at exactly 5500rpm, now up to 6000, in basically every gear.
It feels to me like something not fixed properly that starts vibrating, even if it is not worrying me so much: I read it is common.
Must be said that I didn't lube the chain yet, at 400 km.
After doing so I will check again and report.