CrazyBiker
Wizard
Update: Mostly solved!
I decided to try an experiment... thus far, it has paid off. It seems like the bike was definitely running with the aforementioned lean surge for sure. Because the bike operates in open-loop mode below a certain RPM and before the O2 sensor is warmed... Here is what I did. I disconnected the battery over night a couple days ago. I connected the battery and left for work after warming the bike up to 160 degrees. On the way to work, I ran for 4 miles straight at over 7500 RPMs. With the engine warm and sensors all working (now in closed loop mode) I was forcing the ECU to re-learn and map new fuel tables. This seems to have worked and has added the richer open-loop mixture back which was causing me trouble in the lower RPM ranges. I've had hardly any noticable trouble since this high RPM run and with the ECU running newly learned tables.
What this does tell me is that I've tipped the scale on modifications and will need either the PC III, PC V or the reprogrammed ECU. I think I will start saving my money toward the PC V and an autotune for it. It's either this or go back to stock and sell off all the mods. BTW, paypal donations accepted.
Glad to know it was the lean surge I suspected and it almost got sorted out. Sell off all the bling on the bike and get urself some performance and suspension goodness