Piaggio b125 help

I have a b125 2002 with a fuel leak I also have a piaggio fly 2010 both 125cc I was wondering can I take parts of the fly such as the fuel liner drive belt etc and put it into the b125 help me please

 

Why would you take parts off a newer bike and put them on an older one?

 

I want to know if I can the fly is completely written of so I can only use the parts, just want to know if I can plus the b125 is probably the best 125 around regardless of the year

 

Seeing as they are both Piaggio bikes and motors I don't see why not.
But don't expect a smooth cross over. There are bound to be differences here and there due to old and new.
Compare and measure parts before fitting.