What does that mean? Are you saying that there is a federal statute or regulation that says this? If so, what statute or regulation says it? If it's neither a statute nor a regulation or you don't know the answer to this question, what is the basis for your statement that the "[f]ederal [g]overnment classifies this vehicle as a motorcycle"?
I'd have to read the applicable federal statute or regulation to answer that. Also, were you on an interstate highway? State highway? Some other type of road?
Just because Cop #1 didn't pull you over doesn't mean he/she was "wrong" about anything. I regularly exceed the posted speed in plain view of cops all the time but haven't received a speeding ticket in over 25 years.

