Display Moreone thing to remember ......
WHen the back spring is compressed down the belt gets tighter. And right the opposite...to take the belt off you can disconnect the rear shock and let the swingarm down and the belt will come right off.
I know yall won't belive me.... but it's true. I had the dealer in Athens AL adjust my belt tension in March of 2015. I HAVE NEVER adjusted it since that day. And actually he got it to tight and later that day I moved it back to where it was. So I can say my belt has never been adjusted. She has 30,000 miles on here and I brought the baby home on Haloween 2014.
And remember to always find a flat spot somewhere and check it with the transmission in neutral and the parking brake off. The reason is because you will have the slingshot drivetrain possibly under tension and one side will be tight and the other will be super loose. Just get it where you can move the the top and the bottom of the belt about 1/2 of an inch. If it's so tight you have to mash hard with your finger to deflect it. It's to tight. Especially when you hit a bump. It will get even tighter. ...
As far as I know my 2015 belt has never been adjusted unless it was when they did the recall on the swing arm. I did clean it a couple of times as it was sqeaking and now it needs cleaning again. Working on 75,000 miles.