An Alexandra male dirt-bike rider, 44, has died after hitting a kerb and ejected from his bike at the Grant St-Downey St  intersection in Alexandra.

He was treated by paramedics in the back of the ambulance and transported to the Station St  helipad for airlift to Melbourne.

Mansfield Highway Patrol officers are appealing for anyone who may have witnessed the crash to contact Crime Stoppers on 1800 333 000 or file a confidential report at www.crimestoppersvic.com.au