Australia has always had motorcycle license restrictions . Formally capacity , like when I was a lad , when we had to make do with RD250LC's and RZ250's RG's and KR's , because of 250cc maximum limit . Man those 2 strokes were weapons , giant killers , in my home town race tracks ... I mean meandering maze of roads in the Adelaide Hills . Nowadays however , the restriction is HP , so factories have certain bikes of various capacity , that will be eligible for learner riders . It is a better system than cc , because the bikes to choose from suit all sorts of riders physicality better than just small bikes only .
I think jumping from a small hp or cc bike straight up to a 1,000cc can be risky , or even worse lethal to novice riders , especially with the serious hp today bikes are producing . Also , you miss out on a whole world of diverse motorcycling , that all ranges of motorcycles leading up to big bore cycles encompass . Sort of rites of passage , learning how to ride to survive on less hp and cc , so then build up to something crazy fast with capacity in due time , when you have knowledge to match your machine choice .