VBB1 Engine Rebuild Help

Hello, I’m a vespa enthusiast from Argentina. I’m started a rebuild a 1961 Vbb1T, here are some pictures of the engine:


Now I’m trying to rebuild the engine, but I have some doubts about the kick starter gear:



I move the gear wheel in the rotation way, like the engine is turning on, and the starter gear  make a noise like track track track track. I see the worshop manual and the assembly seems  ok, but I don’t know if the engine works properly and I don wam to to make the finally assembly with the doubt if everything is OK.


There is a video whit the noise:



Thanks a lot!