Defiantly a Dart. I think they call em hero puchs over in the Netherlands. Motor is a 2 speed hand shift puch motor Z50. Kit looks to be a EuroKit (75cc) since it has fins like a metra but is siver.
Since the motor has a clutch it would be pretty easy to get the rear wheel spinning with that setup. Just rev it out and drop the clutch and the back wheel lights up.
As for the dirt track skills, well its just that skills. Shit looks fun.