Engine Size Twister and POPPING noise
 

I am new and think I posted this in wrong spot...oops

Hello my name is Bob and live in Arizona..Just got a Twister go kart for my grandson and trying to figure out how many cc's it is... The engine code is 157FM . Also, the engine makes a POPPING noise as i let go of the gas... Any help would deeply be appreciated...Thanks, Bob

Your in the Chinese section..your good. :)

150cc is more than likely it.. popping as you slow down is either a exhaust leak in the head pipe area. or its jetted lean..

Thank you very much for he help i will try that today . I hope it is just a header leak. Touching the carb. scares me for 2 reasons 1. know nothing about it . 2. i am legally blind can see a little bit but not much...If it is the jetting on the carb. Is that hard to do , or is it just turning a screw a couple of times? Do I have to take out the carb. to do this? Once again thank you....