Police are investigating a crash which claimed the lives of two Dunsborough men in Yallingup on Tuesday afternoon, October 15.
According to Major Crash, the men were riding their Harley Davidson motorcycles west along Wildwood Road about 5.30pm before they left the road and struck separate trees on a right hand curve near Commonage Road.
It is understood that a third rider, who was travelling with the pair, found the crash scene.
Both riders, a 42-year-old man and a 35-year-old man, died at the scene.
Investigators are calling on anyone who may have seen the crash, or the motorcycles before the incident, to contact Crime Stoppers on 1800 333 000.
Those that may have dash-cam footage of the incident are asked to upload it here.