Thanks to everyone who responded to my question. I am running a stock airbox. I first tried to run with the stock jetting and it was a nightmare ... backfired to holy ---- and not good on power so I ordered a jet kit from Cobra and installed it. I was very pleased with the difference at first more power and no backfiring, but a few days later when taking off for work in the morning I experienced the problem. The jets I installed were the ones recommended by Cobra … a 175 main
with their needle and the pilot
that came in the kit, I drilled out the PMS
and pulled the screw out to 3 turns as recommended. It was set at 2 turns from the factory. I just got home from work and thought and checked to see if one of the leads to my fuel heater had vibrated off but that was not the case. I will go back out to the shop when I go off line and check for moisture. Again THANKS for the response!!!