Moki 120 problem
 

I have a Moki 120 that I have been trying to get to run properly.
It starts and idles good runs at full throttle OK but it sputters or cuts in the midrange transistion.
I have replaced the 0 rings in the carb and have played with the low end adjustment it seems to run better at a one point. It will transition if you don't let it idle for more than a few seconds.
I have the needle set at two turns out. I did notice the front bearing has a little play. I am wondring if it may be drawing air through the front and leaning the mixture.

RE: Moki 120 problem
 

What plug and fuel are you using? What prop? Is it mounted upright, sideways inverted? From what you describe, it's too rich at idle. Does it cut out when coming back from full throttle to mid throttle? How much do the rpms increase when you pinch the fuel line (at idle)?

RE: Moki 120 problem
 

Got the motor running great. Found that it needed a new gasket under the banjo fitting.
Replaced it and the problem vanished:)