Zong not starting again

[Pabesco]

Hello to All. Seasons greetings. My zong started acting strange yesterday with a few backfires now today it ran fine then cut off this afternoon and now won't start. I thought it was the CDI again So I replaced it and no difference. I checked the air filter and changed that after oiling it. I checked what I could with the carb and its very clean and no clogs. I took the spark plug out and checked the compression by placing my finger over the hole and no matter how hard I press, my finger gets blown away as soon as it cranks. I left the plug connected to the coil and cranked and noticed the spark is not bright at all and sometimes not there at all. I will get a plug tomorrow but would like to know if that's not the problem where else should I be checking to get my bike running again.
Thanks and have a great evening.