silver Oh I definetly agree about the engines never being alike and I do understand the factory settings are always a starting point, been tunning pwc carbs mikuni triple carbs for a number of years now with eci units and big bore's , it's just that my experience with gas engine is some what limited not as much as pwc carbs, however the basic is there carb needles low and high tach reading spark plug reading and all. I wonder if they use an pop setting in their carbs.

I am going to have to try what DA suggested about tunning the engine the right way, well the person I spoke to on the phone with, and how he tunes his da's.

If I recall correctly.

Set everything at default, to get the engine started, warm it up.

1- Get it to idle smooth
2- Transition to half throttle if no hesitation go on to 3/4 and lean the engine out a little at a time, you should hear the engine pick up in rpm, if not drop accordingly.
3- If it drops, way to lean, back of a a little on the h needle.
What you want is to hear the peak rpm and then back off a little.

Am also going to tach the cylinder and see what am getting when I fiddle with the needle.

BTW am at sea level.