Bikers caught at up to 132mph

Police said the campaign was started following continued complaints from residents around the county that roads were being used as racetracks and more prosecutions are expected to follow.

This summer has already seen a spate of collisions involving motorcyclists on some of the county's most notorious highways.

Sian George, police spokeswoman, said: "Dyfed-Powys Police has consistently targeted indiscriminate riding and excessive speeding by motorcycle users.

"Unfortunately, there is still a minority of bikers that think it is acceptable to ride in an untoward manner which results in unnecessary community distress or the region's roads being treated like racetracks, putting the riders themselves, their pillion riders and other road users at risk.

"Following complaints from residents and the high number of fatal and serious injury collisions, the police have identified areas of community concern and high-risk routes."

She added: "Special operational dates were set up and, within a short period of time, more than 40 motorcyclists were reported for speeding offences.

"The speeds ranged from 94mph to 132mph, but the majority recorded were over 100mph."

She added 10 riders had been disqualified and fined between £375 and £465 and six had been given six points on their licences and fined £250.

Chief Inspector Phil Davies said: "No-one is invincible and these riders need to realise their limits. Our roads are not racetracks."

By Tamlyn Jones