WTF? Zaskar Flat Cap with a twist?

[BrushedAluminium]

I saw a post about this recently but I forget the answer to the question.

Question 1: Why?

Possible shop display?

 

[markoc]

Helium insertion hole for max rad air.

 

[MattiThundrrr]

Looks almost like a bottle holder witness mark on the cap.

 

[longun]

Crud guard??

 

[Guinessisgoodforyou]

Don't like

 

[BrushedAluminium]

Seems an odd modification to make to a bike thats 31 years old and hardly been ridden