Police are calling for witnesses to a serious crash between a car and a motorbike in Hamilton Hill.
A white Daihatsu Charade and a Honda motorcycle collided at the intersection of Forrest Road and Arthur Road about 4.20pm on Friday.
The 62-year-old male rider was thrown from his bike and was taken to Royal Perth Hospital with serious injuries.
The driver of the Daihatsu, a 78-year-old woman, was not injured.
Anyone with information regarding this crash, or who saw either of the vehicles involved prior to the crash, is asked to call Crime Stoppers on 1800 333 000 or report the information online at www.crimestopperswa.com.au.