I just bought my first buggie an Ofna ultra MBX R2. It is used so I didnt have to break it in but it hasnt been used in a while so i needed to tune it properly. Well, I was able to get it running and i think i tuned it up pretty well but sometimes when i go full throttle then let off of it, when i hit it again its like i have no power for a few seconds like it wont get up and get going unless i pump the throttle a little bit. Does anyone know what i need to adjust to fix this?? please help. thanks in advance.