diagnose output port condition, carbed 6 gurus Options

[mskala]

Just getting to the valve adjust on the 914-6, found that
#4 and #6 output ports look different. #5 + all the right side,
are just carbon like from idling rich. What does #4 and #6
look like to you? Thanks for any help.

Cyl #4

Cyl #6

Others

[J P Stein]

A couple of thoughts......which seldom have much worth. (IMG:style_emoticons/default/laugh.gif)

Look at the plugs. Usually, the plug will confirm what the light colored valve is telling you....lean....maybe too lean.....or maybe they all should be that color (IMG:style_emoticons/default/confused24.gif) I prefer rich...all things considered.
Not the most power ("if you wanna be mean, ya gotta be lean"....name that old time drag racer), but safer.

Carb tuning is a black art till you understand how to do it....then it's merely voodo. I keep a supply of chickens.....couple of frogs...oh, nevermind.