All good stuff G , I read it from start to finish ,observed and understand the various methods to tension the belts and after thinkin about it all I have come to only one conclusion.................you need to get out more
. What I did for belt tension was to pull the cover off my Toyota MR2 engine and my ford Capri engine , set the tension with the spring loaded tensioners , felt about how tight the belt was ( very similar on both engines ) and then did the Paso about the same . The belt needs to be tight enough so its not flapping about and not so tight that its stretched . I think that as long as its about right its all good , problem is that you cant put "about right" in a tech publication so there needed to be some spec and , as you can see several people had a go at this in different ways . I would be stunned if there was a seat of the pants difference between 110hz and 140hz , like the belt wearing faster , or the associated bearings wearing faster , or even the bike going faster . I would think , being that the belt is toothed and doesn't rely on friction ( like a V belt ) to provide the drive it doesn't need to be as tight as you might 1st think .
G , your observations are interesting and do shed a bit of light on the subject , I hope others who have not changed their own belts will now have a go because it really aint rocket science
but I have another question related to this topic: Which belt (brand and type) did you use? 
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