About 5.20pm, a black Harley Davidson motorcycle was travelling south on Kwinana Freeway when it collided with a blue GWM Ute travelling in the same direction, near Rowley Road.
The driver of the Ute was uninjured and stopped to render assistance at the scene.
The 25-year-old male rider of the motorcycle sustained critical injuries and was transported by ambulance to Fiona Stanley Hospital, where he later died.
Major Crash investigators are urging anyone who saw the crash, or either vehicle travelling in the area prior to the crash, to contact Crime Stoppers on 1800 333 000 or online at www.crimestopperswa.com.au  ;
Anyone with dash-cam, or mobile phone vision related to this crash, can upload the vision directly to investigators via the link: https://wapf.au.evidence.com/axon/community-request/public/kwinanafreew… ;
The WA Police Force continues to urge all motorists to take care on the road. Drive safely and keep in mind the wellbeing of yourself and others.
If you or anyone you know has been affected by a road crash, contact Road Trauma Support WA on 1300 004 814.