I have ridden to the bus parknride in Ft Bend and Harris counties with no problems from the local the local PDs and constables.
I have only heard of problems with TX law enforcement on some college campuses.
I had lights on my motorbike, but no tag or registration.
If you ride on suitable roads (speed limits around 45mph or less), you should be OK.
Ride like a commuter (bike helmet and back pack) and behave yourself and I doubt you will have any issues from law enforcement.
However, some officers are curious about motorized bikes and may pull you over to find out more about your motorbike.