Google structured data AggregateRating works in page but not in another [duplicate]

Question

I'm trying to put Google structured data in my website but it works for one page but not another. However I have the same HTML code for Google tags and Google structured data tester gives me the same result for those URL:

URL which Google structured data doesn't work

URL which Google structured data works

You can try but searching pieces-suz suzuki-moto in Google search. The first link doesn't display stars and the second displays those.

Why stars are not displayed on the first link ?

Answer 1

Finaly, Google doesn't display rating for homepage.

So, it's a standard behaviour.

Source : https://productforums.google.com/forum/#!topic/webmasters/rMSG5X3TctU