Help! Roller drives too fast! Piaggio ZIP C25

Hello dear community! This is my first post in this forum and I hope I’m doing everything right. I’ll explain the situation: I have a Piaggio ZIP C25 4-stroke built in 2007 with just under 16700km. I bought the via Ebay classifieds. The thing is just great and doesn’t cause any problems. Jumps immediately, drives nicely. Now my problem: I can drive a maximum of 45kmh. If I give this moped but full throttle, I reach easy 75kmh. I’m just someone d The first thing I did: I ordered a new throttle ring and built it into the variomatics. This one has a width of 5mm. What did it do? Nothing! The thing still drives 75kmh! I then screwed up the panel under the seat and looked at this CDI thing. One thing I noticed: The scooter is from 2007 but on the CDI stands the year 20 19. Besides, there is no Piaggio logo on the CDI. Could it have something to do with it? Now I just don’t know any more. I’m just too inexperienced. That’s why I’m asking you for your help! What can I do/check next? I’ve got some pictures of my scooter, the throttle ring that I’ve built in and added from my vehicle license. (On the vehicle license is even the top speed of 45 kmh) Thank you all in advance! LG, David