The 15-year-old Spring Lake boy, Drew Johnson, was traveling west on M-104 near 144th Avenue at about 6 p.m., when a westbound car passed, and then turned into a business in front of him, police said.
An ambulance took the teen to North Ottawa Community Hospital in good condition.
Police said he was wearing his helmet.
Spring Lake High School Principal Mike Gilchrist confirmed this morning that the boy is a freshman at the school.
Johnson suffered two broken bones in his left leg and is scheduled to have surgery this afternoon, said his step-father, Cory Howe.
"He's doing good," Howe said.
Police are looking for a white male in his early 20s driving a green Pontiac, possibly a Grand Am or a Grand Prix.
The car should be damaged and have orange and gray paint from the moped on it, Howe said.
Anyone with information on this incident is asked to call Silent Observer at 877-88-SILENT.
The Tribune would like more information on this incident. Anyone who witnessed the crash is asked to contact reporter Becky Vargo at firstname.lastname@example.org, or call her at 842-6400 ext. 231.