If anyone is interested, I decided to try one of these Nitro X fuel commanders advertised on ebay foe around 50 dollars.

I have had two PC3's on two prior bikes (VFR800 and CBR929). When I bought my ER6 is had a Yoshi Pipe and BMC air filter and was running very lean. Anyway, despite the negative talk about them, I got one. It plugs into the air sensor on the airbox. It has several settings from 5% to 100% (not sure what the percentage is of...). After some testing I have set mine at 100%. It has corrected my fueling, now letting me top out at 200kph (195kph on GPS) at 10,000rpm. Not sure how that compares to a standard bike, but i'm happy. before the fuel commander it would barely do an indicated 180kph. Must say, I'm holding on pretty hard after 170.