O2 sensor? What if we just unplug it for the lean issues?

First post here...had been running drilled stock pipes but just added V&H twin slash pipes and have a ejk tuner on the way. I put the pipes on and took it for a spin with the o2 sensor unplugged since I don't have the fuel programmer yet. I assume the ecu will default to a richer setting similar to the resistor mod for the o2 sensor...Or will it be too rich all over the rpm range? The test ride was only a few miles but seemed to run smoother with less chugging at low rpms in 1st/2nd gear and backfires on decel were not very bad at all. So just a thought for the stock owners looking to do the resistor mod...maybe just unplug it all together.:nod: Please chime in if this has been done, but my search turned up nothing. Maybe it will suck gas like crazy, but don't think so. I didn't ride the bike any more yet and will be a moot point when I get the controller as I have read the o2 sensor gets unplugged anyway.