Gitarzan wrote on 12/31/69 at 16:00:08:Of course, I was much younger then and did have have the internet wasting all my time...
I like that...if the internet had been around when I was younger, I'd have never done anything

First I believe that some weight is supposed to be on the rear wheel when you adjust the tension otherwise it may be too tight when the rear end goes to it's highest position with the shocks compressed. The gage is a "happy medium" kind of thing...and the swingarm and the front pulley are not exactly on the same centerlines. Therefore it can be loose all the way down and tight as a bow string all the way up
And like mentioned above, I have jacked the wheel off the ground to check the alignment of the belt on the pulley...to see if it rubs more on one side then the other, but in the process, I found that the marks are pretty accurate for the rear wheel alignment....so I guess that the welding fixtures for assembling the swingarm are pretty close (I'd like to think so)