50cc-125cc bike for a 16 years old?

I am wondering what is the best bike for 16 years old boy?
i am 180cm high and 85kg weight, the bike has to be under 3000 euros and to has not very big fuel consumption bellow 4L per 100km.
my first ideas were gilera runner 50, aprilia sr50 but i would accept some other ideas if they are good too.
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