I don't think there is a torque wrench big enough to tighten one of those nuts.
Yes there is, just your typical torque wrench and the correct spanner tool. The critical torque is on the two nuts UNDER the top triple tree, not the nut on top. Do you not wrench on your own bike? Plenty of threads on this site explaining it. Get a service manual and research it. You can also search for "roadstar flop test video" here and on youtube. You're scaring me boy, you're scaring me!