I have my engine and all build in but every time i lift the vespa my carburetor comes loose...?

my suspension is all loose on top, it just has a square rubber but isn't attached to the chassis...?

i don't know or this is normal.

please let me know what i can do it is very annoying!

+ every time I pull it in the air a little the suspension doesn't go back on its right place and so it pushes against my back tire!