I have a Streetmate with a 70cc kit 14mm carb bi turbo exhaust and uni pod filter. Starting about a month ago, off start would have no power but after about 45 second to minute and a half the best way to describe it is it would break through and run fine and would not present until it sat for more than a couple hours. Over the past month the problem as progressed to overall bad performance and issues holding idle and cutting out. I first removed the spark plug and it was operable but cutting it close so I replaced it, cleaned the carb and checked the air fuel mixture with no difference so at this point I don’t know what to do being new to mopeds any suggestions are appreciated.