About 6.55pm, a red and black Harley Davidson motorcycle and a white Toyota Corolla hatchback collided on Great Southern Highway near the intersection of Greenhill Road North.
The rider of the motorcycle, a 42-year-old man, sustained critical injuries and died at the scene.
The driver of the Toyota, a 62-year-old man, was injured and conveyed to Katanning Hospital for assessment.
Investigators are urging anyone who saw the crash, or either vehicle travelling in the area prior to the crash, to contact Crime Stoppers online at www.crimestopperswa.com.au or by calling 1800 333 000.
Anyone with dash-cam, CCTV or mobile phone vision relating to this crash is asked to upload the vision directly to investigators via the following link: https://wapf.au.evidence.com/axon/community-request/public/fatalcrashka…