I have measured slack with the bike unloaded on its sidestand, and then again mounted on a rear stand and the slack was the same amount. The bikes own sag was the same either way.
Yes that´s right. I found it out myself yesterday, when I (for the first time) adjusted the slack. I use a paddock (rear stand)
It´s must be rather tricky to do adjustments when the bike is on the side stand :
To find the tightest part of the chain you must rotate the wheel. This is difficult to do when the wheel is on the ground
From the service manual:
•Raise the rear wheel off the ground with the stand
•Remove the cotter pin , and loosen the axle nut.
•Loosen the both chain adjuster locknuts .
If the chain is too loose, turn out the right and left chain
If the chain is too tight, turn in the right and left chain
adjusters evenly, and kick the wheel forward.
•Turn both chain adjusters evenly until the drive chain has
the correct amount of slack.
To keep the chain and wheelproperly aligned, the notch on the left wheel alignment
indicator should align with the same swingarm mark or
position that the right indicator notch aligns with.