sputtering issue

[woogie_man]

Hey guys

Well I have been riding and just had to replace the head seal. After that was done,I went to run and was going good for a while. After a bit the engine was sputtering and acting up, looking down at my fuel line,I noticed many little bubbles.

I am currently running a 66cc flying horse motor, walbro carb, custom exhaust, and have opened up the transfer ports and ranked the piston.

Thinking that my carb is getting to hit and causing my fuel to vaporize before it gets into the carb. I am also looking at the possibility of the exhaust possibility restricting flow as well.

Any thoughts or ideas guys?

 

[Kioshk]

A vibrating carb can cause frothing in the carb-bowl, which in turn causes reduced and intermittent fuel-delivery. Be sure to minimize vibration; a shorter intake can help.

 

[crassius]

what he said plus loose motor mounts can cause this too, or any rubber or other flexible material used for a mount

 

[woogie_man]

There is no carb bowl on this unit.