Mounting/protecting a NEX. Similar to GoPro
I've seen videos of people using Manfrotto Superclamps. It can quickly add up because of all the accessories, but it is supposed to be one of the tightest mounting options there is.
However, you said
motorcycle ride in India
. Which will probably mean a lot of vibration maybe even shocks, dust, and the occasional monsoon.
While I love the Nex, I think a GoPro would be a better option.
Also: you can try to win one
This forum needs a +1 button. Not just the comments.