Better get this right lest I be chastised by those who think they can walk on water..... A friend of mine is a police pursuit motorcycle rider trainer. Last time I spoke to him, they had a group of un-marked Honda Blackbirds though these bikes will probably have been updated by now. After their training, a team would be out and about waiting to be called into service. For instance, should there have been a robbery or similar, it was their job to track and, with their training, road knowledge and the bike's speed, to get in front of whatever vehicle(s) were being chased to advise the marked police vehicles as to which route to take etc. Their job was ' not to be seen '. As CBR250 wrote, not all motorcyclists are what they appear to be.