A speed camera clocked a man riding a Ducati motorbike at 199 km/h on State Highway 5 in Hawkes Bay.
Dylan Roberts, 24, was snapped by a speed camera on June 23.
In Napier District Court yesterday, Roberts pleaded guilty to a charge of driving at a dangerous speed, which carries a maximum penalty of three months' imprisonment or a $4500 fine.
He said he had gone up and down the road only once as he was test-driving the bike.
Lawyer Leo Lafferty told the court Roberts had been the only driver on the road at the time he was caught by the speed camera, which was mounted in a roadside van.