Open 125er as second-moped ???

Hello Have a few questions: I’m still looking for a “small” 2-stroke moped for the shorter distances and dirt roads… I’ve looked at a DT 125R (year of construction 2000) which, however, is throttled to 80 km/h… I wanted to log it in openly. What do I need to thrott the moped? only an open CDI? I heard that you don’t have to pay any KfZ taxes until 125ccm, right? What do you pay for such a moped in the insurance? (willn’t be very much if you open it a I know it depends on the percentages, but what experiences have you made regarding open 125s? What is the cost to me if I want to register the moped with the TüV as undisturbed? Is there a good tuning exhaust that you can legally drive? (should I bring a little something, just because of the optics I don’t need it) Would you be good if you could help me a little bit further… Oh so, many of you will be wondering why I don’t have a bigger 4 T akt moped add… But I’m still looking for a small light moped for the short rides in between… and a 4 clock moped I already have… The swallow I have now is unfortunately not so cross-country and I think even more expensive in the insurance