Respect for personal property has become very lacking in this society.
I belong to a local fishing forum and two people in the last week have lost boat,motor,trailer right out of their yard. Everyone in that forum is keeping an eye out by not only watching for the items but even checking craig's list to see if they get listed.
Also there are several posts by people that have found valuable fishing gear and by letting others know on the forum, have been able to locate the owners.
One was a handmade lamiglass salmon pole. Made by a mans son. He lost it in the river 3 years ago and had given up on it. The guy that found it was able to locate him because his name was on the rod and the man was more than happy and now they are good fishing buddies.
Returning stuff that ain't yours is the only right thing to do.
I have to admit that I haven't tried to find the owner of a Cabella's insulated mug,. that I found by a river.

Daq, I doubt your bike is attended constantly while you are out and about so I guess if someone finds it by the road it will be ok for them to take it?