gy6 150cc motor surging By scooterguam (Read 425 times)

[scooterguam]

Hi Members

Im new to this forum and looking for some help to try to trouble shoot my gy6 150cc motor being very unstable with the idle and surging

thing I have done already

checked all the vacuum lines blowing smoke and also carb cleaner to trace any leaks..none

petcock working good

intake manifiold no leaks I did the smoke leak test and carb cleaner none

insulator no leaks

manifold gaskets new

cam timing good aligned on the cam with TDC

valves adjusted 004 005

head and cyl new no leaks

spark plug new

coil good strong blue spark

drain the fuel added new fuel still the same

jetting and piolt stock #35  #105

I have a video ill try to post it

[seafish]

check your throttle cable on handle , it maybe getting hung up. That is what my did a twice almost had accidents over it.

[rob63]

It could be running lean, have a look here on how to adjust your mixture link