Great entertainment, and there's no doubt about the skills of police motorcyclist - he has to ride within reasonable safety limits, whereas the pursued rider does not.
But I wonder whether the original crime (or, maybe just a traffic infringement) justified risking the life of the cop and innocent bystanders. Probably not.
In the UK (probably other places too) the chase would have been called off within the first minute - not by the cop, but by his control room supervisor.
Also, yes nice ass!