Runner 218cc keeps bogging at above 7200+rpm

Greetings lads, so this is a fresh issue for me and one i have never encountered before from my experience and could not find anything about it online. so around 4 days ago as i was riding home from work,i went to overtake a car and once it reached about 7200rpm give or take it just suddenly bogged to below 7000 and then went back to normal again,it confused me but i thought it just got choked for no reason and continued on and it did not happen always but it happened twice more on my ride home when i went above 7200rpm,it does not always happen at the same rpm but it has to be above 7200,so this being my daily i got scared and went disassembling it as soon as i got home and i figured out that the belt had a few cracks on it and the sewing on the right side was almost completely gone which led me to buying a new belt the next day which seemed to fix the problem for a few days and just earlier today,i was out riding with my girlfriend and we had a 50+km journey and it was all fine and by the end when i was taking her home,the bog happened again,i am very confused and if anybody has a clue what could be causing these bogs,i guess the belt just slips at that 7200+rpm range and then continues back to normal, i was told its a clogged jet issue but the issue dissapeared for a little with a new belt so something is giving my belt some troubles in the CVT system.

 

Worth noting that it does not always happen,every now and then.