About KEIHIN Carburettor

I have vespa 125cc et4. But I am not sure it's leader or not. I need a brand new carburetor as below link ;

 

http://www.sip-scootershop.com/en/main/base/Details.aspx?ProductNumber=61827000

 

So, I want to know that carburetor can fit vespa et4?

 

Waiting your kind revert.