Police have launched a campaign to target bikers who use small number plates to avoid being caught on speed cameras. It follows reports of motorcyclists driving at excessive speeds in the Humber region.
Officers hope the campaign over the Easter holidays will stop so many of them from speeding during the fine weather in the summer months.
Police say motorists displaying illegal number plates will be prosecuted.
Roadside checks
Pc Andy Walker, casualty reduction officer in Hull, said: "This campaign is directed at motorcyclists because of the alarming increase in serious injuries combined with evidence of increased illegal number plate use.
"In most cases the use of such number plates is a deliberate attempt to evade detection for traffic offences.
"Small, misaligned number plates make it difficult to identify speeding motorcyclists and therefore they remain a danger on our roads."
The initiative will involve specific routes, individual motorbike checks, and roadside checks.