R1100 GS - low octane fuel question

[gilles27]

Hi,
I'm just re-igniting this old thread. Some good info here but I'm wondering if any new experiences or info can be added.

http://www.horizonsunlimited.com/hub...injection-4317


Does anyone have any experience of how a fuel-injected BMW R1100GS will run on lower RON fuels?
I will be taking a British spec bike to Sub-saharan Africa next year. Many of these countries use 88RON and even lower.
I use a K&N air-filter but the fuel injection, air-induction and combustion systems are standard otherwise. Should I get the bike retuned before I leave?

The linked thread suggests not but I'm wondering if the K&N filter makes too much of a difference.

It was mentioned in the thread that 'low octane' ignition rotor can be fitted.
Any thoughts? Experiences? Is it worthwhile? Is it worth keeping the bike in standard tune until I reach Africa and then fitting this rotor.

Lastly, swapping internal fuel filters to external.
1), Is removing the internal filter straight-forward?
2) Can I use a standard generic in-line fuel filter or do I need anything specific?