UK here 2016 super 8 2t 50cc pulls well till about just over 20 then struggles over 25mph...how can I get 35ish with basic deristriction and what parts I need... New to scooters so be gentle. Last bike a zx9r which was 180mph so dipping my toe here. My daughter gonna be using for college so don't wanna go mental would appreciate part numbers and where to get.