A parts diagram is available here:Been wondering where it was myself
You would probably do better if you added some fuel management like a PCV to fatten the mixture up since you're moving air more freely and the bikes normally run a little lean for emissions. That said, what you hear is roughly correct, feedback from the O2 sensor will cause the ECU to adjust long-term fuel trims [LTFTs], up to a point, there's a maximum on LTFTs and BMW wants the bike lean. Some ECUs will throw a code if they can't get their mixture where they want after maxing LTFTs. Unlikely in this case.I have also made some changes to my GS recently. I have replaced the stock exhaust with akrapovic racing line(carbon fiber) and BMC air filter(stock replacement) in place of stock air filter. I have noticed some good gains and great growling from the bike. After all this now i am little concerned about the air fuel mixture. Do you think the g310 siblings need ecu remapping after exhaust and air filter upgrade ?
Ps - I have heard many people saying that the O2 sensor would self correct and take care of it.