Man dies in Adelaide motorcycle crash

South Australia's road toll has hit 50 with the death of a motorcyclist in Adelaide on the weekend.

A 28-year-old man has died after crashing his motorcycle into a tree in Adelaide's northern suburbs.

The man died at the scene at Elizabeth Downs on Sunday night.

His death brings the number of fatalities on South Australia's roads this year to 50, compared to 59 at the same time last year.