Well, I thought I would revive a dead thread and share my experiences.
I was recently changing the rear tire according to Lamonster's excellent video, using his tip of disconnecting the rear shock, so as to not change any of the belt settings. I replaced the tire and buttoned things up and gave it a spin. And, what do it hear? A massive groaning from the belt in both directions. It's very obvious the belt is way way too tight.
I had bought the bike used and it had been serviced by a dealership 2 years, but only 500 miles before I bought it. The belt had been set by the dealership at that time. I now assume it was at the old specs and not the newer ones. After I had purchased the bike I checked everything over, including the finger belt twist. I thought it was too tight, but left it alone because I figured the dealers knew best and I didn't want to screw it up, plus it seemed to work okay.
This was the first time I had jacked up the bike and spun the rear tire, so it was the first time I heard the loud belt groan, so I knew I had to do something about it.
I already had a Krik-it II, so I read up on it, what little there is, and decided to check it before making any changes.
With the bike on the ground I checked the tension at several places on the top part of the belt and settled on the mid point as being the most accurate. At that point I was getting a consistent reading of over 200#. So taking care to adjust both sides of the swingarm equally, I turned the adjusters 1/4 turn and then rechecked the readings. After a 1/4 turn I now got a consistent reading of 180#. I then loosened it another 1/4 turn each, and took another set of readings. It now reads a consistent 160# as mentioned several times in this thread.
It no longer groaned, but honestly to me it still feels too tight. I decided to leave it and take it for a spin. I don't notice any less vibration as reported, but it does seem to shift cleaner and when backing is much quieter. I thought all of the noise when backing was brake squeal, but I now realize that much of the noise was the belt groaning.
So for now I'm going to leave it at #160, but I may get a bug and try a little looser, maybe around 140#, but for now it's good enough. :thumbup: