There's a local bikers cafe here that have always had a scooter meet on certain days. I'll try and get some pics if I'm about. There's an orange Jeans model that always get my attention as I go passed
Those throttle stop screws shouldn't really be messed with as they're set to a point that the ECU knows as throttle shut and needs specialist info and often equipment to reset.
Could be worth giving the throttle body inners a good clean as they gum up and don't fully close or let less air through.