Sorry for the loss of the rider. A busa doesn't come cheap. Hope it was insured!
And yes, abroad a learner can ride upto 125cc or specific BHP bike.
Then you need to take a test and learn bikes upto 400cc i think, then it's 800cc and then finally over 1300cc..(Rules and regulations varies from country to country)
In Pakistan, Bike de do baad mein dekha jae ga
Hope the rider is safe!