Interesting CB1100 for sale

[Venteuri]

Still available.

The 90° coming off the front of the airbox needs to be drained. This is a much overlooked maintenance item. It should be see through, but yours is full of fluid.

Appreciate you pointing this out. Do you know what function this part serves the motor specifically?

This is what I found, I was not aware of it until, Randy B, mentioned it.

Crankcase breather drain tube: part of the emissions system that collects oil vapor residue, moisture, and potential engine blow-by. It is a standard maintenance item to drain this tube, especially if it appears filled with dark oil or milky fluid.