At least 400 riders are expected to 'occupy' the harbour bridge at 40km/h tomorrow.

At least 400 riders are expected to 'occupy' the harbour bridge at 40km/h tomorrow.

At least 400 riders are expected to join the 'on-road demonstration' from 12.30pm.

Motorcyclists are gathering in Auckland ahead of a planned protest ride across the Auckland Harbour Bridge on Saturday.