Need help 50cc with 80cc bbk
 

Was taking my moped for a small test today before changing the main jet to #90 , I hit full throttle and it started to not pull. Was struggling to even do 30. I'm fearing the worse as it turns out but won't start; would like some insight. It has a 20mm carb as well and A9 cam.:thanks:

It did kill itself at the stop sign.