Vespa PK 50 XL bj. 1991 – Inspections

Hello guys, I’ve been standing in the garage for years, but I haven’t done an inspection or anything like that yet. Since 2007 I’ve been mostly in the garage (about 100km/year) I’d like to know what are the inspection intervals and what do they include? Furthermore, after this long time, what do you think would have to be done on the scooter/engine? I’m grateful for any information, because until now I have absolutely no idea what the scooter/engine needs in care. D anke and best regards Wilson