Hi guys…I have a Tao Motor 150cc ATV (sport model) with automatic transmission. It sat for over a year and I had to replace the carb to get it running again. The carb is a Keihin PZ27. I have no technical reference for jetting or air/fuel screw settings. It starts and runs but doesn’t settle down to idle, and it runs best with a slight amount of choke. The pilot jet is a 38. Can anyone recommend a starting point for pilot size, air/ fuel screw setting or any other tips? Any help would be greatly appreciated.

 

Can you install the jets out of the old carb?

 

The pilot jet in the original carb is a two piece item, whereas the new one is a single piece of brass. The carb body is threaded a bit differently as a consequence.