this will not be possible by having just his nicop, i believe you need power of attorney in name of any person in Pakistan on his behalf so his POA can act as owner and transfer his bike to your name. It may be possible if you already have a transfer letter signed by the owner without going through POA.
an overseas Pakistani can get a POA for all or specific task and get it attested from the Pakistan highcommission to be a valid in Pakistan.
hope it helps