Ok I have a 90cc engine. New piston, rings and valve adjustment. Running 150 psi on the cylinder. Timing is on the mark. The ATV starts decent with choke on. idles ok with choke off. poor acceleration from start. picks up ok once rolling. If I smash the throttle it bogs. The Air mix is adjusted an 1/8th turn open and the idle all the way in. This is close to the only way it will start. Not sure what exactly to do? I cleaned the carb and visually it looks clean and free from garbage. Float is in good working order. I got this quad from a cycle center. It started off as a 110ST and they put a 90cc motor in it. Maybe they used the wrong carb I dont know. Any advice would be helpful. thanks

 

Any advise please. Im trying to take the kids riding this weekend. thanks