ur not wrong
I ride mx bikes and we cant even go down underneath the mulgrave bridge anymore. Down near the speedway/boatramp is alright, its not a big area but ok, espicially for mini's. The only other place is Machans beach or Redlynch which u prob already know about. All the other places i ride are on my mates private property. Let me know if u find any other spots.
Cheers