Welcome Kymco Owners!
I never, never tighten bolts at recommended torque. I just seat it, tighten a bit, then tighten 1/4 turn. Old school, but it works. However, I think your case is an isolated one (I hope)... Maybe just a bad bolt...
Yea I don't use torque values either, from tightening so many bolts on different machines, I go by feel.
Not sure I can trust myself with tightening by feel ;-)
I guess.... First lesson then, how much torque is hand tight (with a screwdriver)? 5 ft.lb?
Whose arm? try to experiment.... tighten with a torque wrench and try to further tighten with your hand and see if the bolt still moves, then you can estimate from there. Do this several times to get the average feel...