Its supposed to be done with the bike on the side stand. Dont worry about how many turns etc, just rest your ruler on the swing arm in a vertical position and tighten the nuts equally until you are getting 1- 1.25 inches of movement/slack when you pull the chain up and down with your hand.I'm going to attempt to tighten the chain tonight. In your guys' opinions, how many turns on the locknut should I start off with, to tighten the chain about a 1/2" (13mm)? I don't want to overtighten, but I'm quite novice to how many turns each swingarm nut will need to make the chain a 1/2" tighter.
Also, should I test the chain slack with me sitting on the bike? Or it it okay for the bike to be on it's side stand or have the rear lifted to check the slack? The slack was at about 38mm with the bike on its side stand.
After a while you dont even need to measure it, you just grab the chain and flop it up and down at the middle point on the swing arm and you will know whether its too tight or loose.