Too much fuel at the 1100ish rpm, what jumps out at me is how low the CO2 is, WAY too low. Most relatively stock engines w/o a cat can easily put that at 11-12% in good
condition and tune. Some cat equipped ones have gone in the ^14's. Rich mix will jump the CO & the HC's up slowly, lean will drop the CO but raise the HC's quickly. The more
efficient you're burning, the more CO2, and the less O2 you will see. Basically, you need to start leaning the idle screws until the HC's stop dropping w/the CO, keep in mind
the idle speed needs to be kept after as you make the changes. The throttle plate position at idle will affect driveability, A/JformS just walked a member thru' the process for
checking this & working with it, I believe it started out as a "timing retarding" on a teener in the elec./ign. forum.