Nozzle problem Mikuni carburettor at 50cc Gilera

Hello together, I have today for the xth time expanded the carburettor to replace the nozzle. I have now changed the main nozzle #98 against a 65 nozzle (no more carburettor throttle available) Now I am still unsure with the side nozzle, there is 20 on it and I think that is too small. So I just ordered a 32.5 side nozzle at ebay (Mikunireconstruction). Would this work, first of all from the size? Problem is that I do not have a constant idle speed one In the air filter box the previous owner had drilled an extra hole in it, when I had seen it, I glued it tightly, after which the scooter drives like throttled only 20kmh. I don’t understand that either. So I haven’t yet assembled it again, since I want to wait for the side nozzle. Gilera Stalker 50ccm Mikuni 17,5 (Echoke new, carburettor not original previous owner replaced) Techn igas Silent Pro Chopped 6,5g Varioweights green Polini clutch springs BJ2003