I have done a little tweaking of the fuel pressure, so far to good effect.

With the bike warmed up and idling, I reduced FP from 45 to 20 psi. Idle is a bit smoother and though I do not yet have any sort of EGO sensor, my built-in unburned hydrocarbon detector (nose) seems to indicate that it’s not nearly so rich. No-load reving reveals MUCH less black/gray smoke as well. I was able to create a rather James-Bond-y smoke screen by reving up against my fuel cut rev limiter. Not so much, now.

I hope to get in at least a short ride this afternoon, if for no other reason than to see how Buzz rides now.

The theory I’m working on is that a required fuel setting of 1.8 for (4) 245cc/min injectors is just too rich and the pulse width probably can’t get any shorter reliably.

By reducing the pressure, I have essentially changed my injector flow rate to 166cc/min. The injectors may not atomize the fuel quite as well at this lower pressure, but the observed effect on Buzz seems to be an improvement.