Expressway police got the call at 10.45am. A cop directing traffic near the Bon Kai exit flagged him down and booked him.
The biker, who has not been identified, appeared intoxicated and was unable to give his name.
He was taken into custody to sober up so he could be interrogated.
Witnesses had spotted the nude rider all the way from Saraburi, through Ayutthaya’s Wang Noi district, and into Bangkok via Phaholyothin Road and the expressway.