Dresser bar installation question

This is probably very easy but I am nervous about loosening the engine mount bolt to install the bars. Should the motor be supported if the nuts are taken off? Of course I would do one at a time. I know that the torque on the bolt should be 60nm, but what if you are off a little on that. My torque wrench is not very high tech, it just the bar type which I do not think is very accurate. I appreciate all comments.

You need to support the engine. Any sort of jack should be able to do that. You don't need to lift the bike with it, just take the weight of the front of the engine. You will know when you have it correct as the long bolt will slide out easily. When you put the dresser bars on then it should slide back in easily. Put the nut back on, loosely attach the bottoms of the bars, then tighten everything up.

You torque wench should do the job, but check it again after riding, and then after a bit more riding.