New Mexico state police Sergeant Cornell Evans says John Scully was on State Road 104, in a remote area in the northeast part of the state, when he lost control and crashed on Wednesday.

The Toorak man was pronounced dead at the scene.

"The only thing we know so far is he was with a tour group and he just ran off the road," Sergeant Evans said.

"He was on a state highway near a little town called Conchas Dam, and it looks like he was going around a curb when he left the road."

/**/

Sergeant Evans said Mr Scully had been taking part in a tour with the EagleRider company, founded in 1992 and claiming to be "the world's largest motorcycle travel and tourism company".

The Department of Foreign Affairs and Trade confirmed it was assisting Mr Scully's family.

"Department of Foreign Affairs is providing consular assistance, in accordance with the Consular Services Charter, to the family of an Australian man who died in the United States of America," a spokesperson said.

"Due to privacy obligations, we are unable to provide further information."

The investigation remains ongoing.

With AP