Check this out Boomer...if you want hi-tech. I drilled the square 3/8" hole to accept a torque wrench, but it's only for reference when using the bounce method. Just to find out what the torque ends up being...think mine was in the low 20's ft lbs. Easy steering head adj. tool
If you don't want to go to this trouble, a brass drift punch, or some even use a large screwdriver.
If you want it done right, I'd recommend doing it yourself, we'll talk you through it. You're welcome to use this spanner wrench....just PM me.
danny is right on, all you need is a 27mm socket to get the big nut on top of the triple tree on and off and all i used was a 3", 1/4" socket drive extender and a hammer to tighten it down. had to have 2 guys there to help tho. one sat on the passenger seat and the other held the handlebars and risers while i did the bounce test. that made it a lot easier than ripping the handlebars apart.
my headlight is a bitch to get back together but i'd say if it wasn't it was all good in about an hr and a half.
any questions you can PM me as well, altho danny has done it many more times than me!