Well, for esc and motor I've fitted the brushless 3250kv motor out of my drifter that's gathering dust and a Hobbyking Xcar 80a esc that I borrowed out of one of my rc bikes.
Quite surprised by the result. It's really smooth.
Nippy enough too, it'll pull wheelies off the mark.
Good runtime too about 25 minutes.
Was only planned as a experiment but I might leave it in for the time being.
Motor gets a bit warm so I've fitted a fan/ heat sink. See how that goes.