Two men were killed in Queens last night when their speeding motorcycle plowed into the side of a city bus, police sources said.

The men were riding on a Suzuki motorcycle going east on 31st Avenue in Jackson Heights when a Q47 bus in front of them made a right turn onto 73rd Street at about 8:10 p.m., authorities said.

“The motorcyclist struck the right front of the bus,” said MTA spokeswoman Deirdre Parker.

The two victims — one 25 years old, the other unidentified — were rushed to Elmhurst Hospital, where they were pronounced dead.

A police source said the motorcycle was going very fast when it slammed into the bus.

The bus driver and two passengers suffered minor injuries and were also taken to Elmhurst Hospital.