Perthshire road.The A93 from Perth up to Aberdeen through Blairgowrie and Glenshee has become a magnet for motorcyclists.But a group of Conservative politicians say some of these bikers are putting lives at risk by driving at excessive speed on narrow, winding roads, and causing sound pollution through the use of unsilenced exhausts.The slave who took on the institution in Scotland and wonMurdo Fraser MSP has now written to divisional commander Chief Superintendent Andrew Todd to ask if officers can monitor the speed of bikers.Mr Fraser said: “This is a big issue in the Blairgowrie and the Glens area.“Motorcyclists obviously love to get and about on rural roads, but they should bear in mind that there are dangers of speeding on narrow roads.