The incident happened in the wee hours yesterday, when 17-year-old Naveen was out for a "fun ride" with his 24-year-old friend Akash, police said.
They were not wearing helmets, they said.
Their motorbike hit the stationary pickup van that had suffered a breakdown on Shahdara flyover near Mansarovar park metro station, said AK Singla, DCP (northeast).
Naveen sustained severe head injuries and was declared dead by the doctors in the hospital.
The results of Naveen's post-mortem are awaited and the police will only then be able to determine whether he was also drunk, added the officer.
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