Is my Bosch CX hosed?

[DanInStPete]

Hey all, this is in the Bosch thread but I need a larger audience maybe.

I came home from the last ride perfect. Flipped it upside-down today to lube the chain before a ride. Spun the cranks some while cleaning the chain. Then out of nowhere this noise starts. It's coming from inside.

Does anyone have any idea what that is?

 

[fooferdoggie]

sounds like the chain is doing it.

 

[ElevenAD]

because the bike is upside down gravity could be causing your chain to bump against the top of your chain guide? flip it back over and see if the noise stops!