I got me a 88cc big bored 50 motor. Here is the problem. when you rev the motor it, the revs drop slow. Does anyone know what tis could be? Also its having a hard time at idle. It wants to die some times and some times it doesnt. thanks for the help guys.

 

if i could help you i would, kinda sounds like it isnt gettin enough gas but idk

 

its getting to much gas play with the fuel mixture screw
turn the idle up where it will idle
set your mixture screw at one turn out go from there