The technician who set my Ten's CO when the previous owner got it new, apparently did it on the bike, according to the previous owner. I've not been able to get hold of the technician and sit with exactly the same problem/results as you.

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2014 XT660Z - Barrett pipe, DNA stage1.5, Barkbuster hand guards and handlebars, Pivot pegs, Teknik suspension, Guard-it engine protector combo, B&B rear rack, Trax topbox.