This is my first post, so be gentle. As your question was about torque on the 206 I suggest you do this. Do not fly it. On a ground run do your normal start and when you increase the rotor speed over the N2 yellow caution band bring the twist grip back to the Idle Detent. Your N2 NR needles should be above the N2 yellow caution band. If it is not then you probably will not be able to autorotate, well not for long. An engineer should be able to sort this out, ie if you are below the yellow band the pitch links should be shortened. The other check would be to check your engine oil pressure is in tolerance. Torque is measured by a modulated engine oil pressure, so if the engine oil pressure is high so the torque reading will be high, and vice versa.
Hope this helps
Hiller