The overexcited cyclist was pulled aside and instructed to put his jeans back on before being spoken to by officers.
According to The Mirror, organisers of the World Naked Bike Ride (WNBR) removed the rider before the ride started in Canterbury, Kent, on Saturday.
The naked rides, which take place in cities and towns around the world, are organised to highlight the dangers cyclists face from cars.
Participants are permitted to cycle naked but must adhere to strict rules.
Protesters can cycle “as bare as you dare” but the rules state they must be riding bikes and there should be no skaters, or runners and riders cannot wear face masks.
Under 16s must be accompanied by an adult.
Organisers had previously told participants: “The police have confirmed they WILL act on ANY inappropriate behaviour and we, the organisers will support that.
In a response to complaints, organisers said: “We do not accept this behaviour and he was dealt with and removed before the ride started.”
It is the third time the daring demonstration has taken place in Canterbury.