Hireing a Motorbike/scooter in Madeira.

[twolitre]

I have decided to have a convalescent holiday (after my bike crash) and rather fancy Madeira. The scenery looks stunning, but since I cannot yet walk too far, some kind of transport is desireable.
Any advice about hiring a two wheeler (or perhaps even four wheels) welcome.
I realise that Madeira is Portuguese and will probably have regulations similar to Portugal, but s there anything I need to be careful about?
Jim