Police are carrying out roadside checks to try to cut the number of bikers who die on Nottinghamshire roads.
Eighteen motorcyclists were killed in the county in 2007 compared with 12 in 2006. There have been four such deaths this year.
Officers will be carrying out speed checks and safety tests on motorbikes during Operation Retina which will run until the autumn.
Bikers will also be given road and vehicle safety advice.
Ch Insp Andy Charlton said: "It is clear riders are over represented in the road casualty figures and as a result Nottinghamshire Police has set up Operation Retina to raise awareness among bikers and drivers of their vulnerability.
"By highlighting this appalling loss of life in one road user group early in the season we hope to educate riders and drivers to take extra care over the next few months while out on the roads."