I found some Vic stats from which you could infer some stuff:
https://www.tac.vic.gov.au/road-safety/statistics/summaries/motorcycle-crash-data
It seems that it's a roughly half half split of single vehicle vs multi vehicle.
Even if you conservatively assume that only a quarter of the mutlivehicle accidents are the fault of the rider, it's still well over 50% motorcyclists killing themselves.
But that's not what this particular campaign is about.
I found some Vic stats from which you could infer some stuff: https://www.tac.vic.gov.au/road-safety/statistics/summaries/motorcycle-crash-data
It seems that it's a roughly half half split of single vehicle vs multi vehicle.
Even if you conservatively assume that only a quarter of the mutlivehicle accidents are the fault of the rider, it's still well over 50% motorcyclists killing themselves.
But that's not what this particular campaign is about.