Manual Tensioner Instructions - concerned

These are the instructions that came with my manual CCT. Something doesn't seem right. I thought the cam covers have to be in place to install a tensioner? But then how do I know how tight to go with it?

I also have a manual OEM tensioner from an earlier 650. Will that work or be a better option? The stocker on my 80 that's all automatic concerns me.

I don't trust those instructions.
Steve

Do it like this, works every time and no need to remove the cam cover.

Get a 17mm wrench on the ign side of the crank.
Rotate the crank clockwise with the wrench so that all the slack is taken up at the front,
Now by gently rocking the crank ( first anticlockwise and back ) with the wrench ( not enough to move the pistons ) you will feel the slack in the camchain on the tensioner side.
Whilst rocking the crank you need to simultaneously wind the APE tensioner in by HAND until the amount the wrench can be moved is reduced and you can barely feel any give in the chain. ( As you rock the crank the tensioner screw will rotate very easily with your fingers )
Once that point is reached, rotate the crank a few times , re-check and then lock off the tensioner.
You should now be good to go.

Thanks man. I got 'er done! First 2 times I was gun shy and left it too loose. Hell of a noise. Next time I dorked up the jam nut and it came loose. Last time through, I turned by hand until the crank got noticeably harder to turn. Then I cranked the jam nut down good. Nice quiet happy chain. Thanks.