Originally Posted by itsatdm
Are you saying the ignition advance and curve is the same for a 650gs and a F800gs?
I have been under the ASSumption that is not true. One reason is that one bike needs premium and the other runs regular. They both have the same CR and I do understand dynamic vs static compression ratio's.
To add some credence to that, several months ago a poster added the F800cams to his F650. Initially he reported it started fine and further testing was required. His last post was the bike needs the F800gs ECU without further explanation or posts.
I will tend to second your motion..... As the 8GS does not have a knock sensor, and the 650 does..... different octane req. I would like to think that the ignition map are different between the two.