A motorcycle safety instructor is speaking out about the danger of people who speed and drive motorcycles under the influence.

On Friday, police said they stopped an impaired 33-year-old man driving a motorcycle on Pitts Memorial Drive in St. John’s travelling at 219 kilometres an hour — more than twice the legal speed limit. He also owed $19,000 in fines.

The behaviour leaves Mount Pearl motorcycle safety instructor Darrin Dunphy disgusted and dumbfounded. He said drugs, alcohol and motorcycles should never be mixed.

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Motorcycle instructor Darrin Dunphy said drinking, drugs and driving don't mix. (CBC)

"That's putting the public at great risk — never mind the motorcycle driver," he said.

"This balancing act that we do every day on our motorcycles it's a challenge onto itself," Dunphy added.

"So when you introduce alcohol into that, and high speeds, it doesn't take much. You can be a pretty good rider, [but] if some little thing goes wrong at 200 kilometres per hour it can end badly fast."

Dunphy said most motorcycle drivers are safe but he fears a few dangerous drivers are poisoning the public's perception of the rest.