As has been mentioned, the manuals are a guide, not a bible, even the BMW shop manual is wrong on occasion .
If in doubt, stop and ask questions, on average you'll get a fairly quick response on this site, unless it's around the holidays, etc...
If you can't get an answer here, there's always Boxerworks, an immense amount of knowledge of airhead BMW bikes on that site, also a lot of attitudes, just beware you may need a 'thick skin' for some of the responses you may get there .