FZS Chain noise

[jackojet]

This is driving me nuts now,,, measured it again this morning on the side stand, getting about 40mm play if you measure it from the bottom of the link, then push up and the top of the link is def 40mm. I'm pushint it up as far as it can go and pulling it down with the same amount of force. Checked the markers in the adjustment bit and the are equidistant andprobably a mill past where it started from.

Am I over complicating this? Do you need 40mm difference from the bottom of the chain to the bottom when you push it up  :'(

(measured the drive chain slack as shown in the manual,,,,)

Might get the boy to sit on it tonight and remeasure....

when you measure chain slack are you checking it on tightest part of chain? You need to spin wheel and measure on different parts of chain, once you have found the tightest spot mark it with a pen and then adjust to that.
Chain develop tight spots as they wear. If you set adjustment to loose part, the tight part will be like a bow string and that's where your whine will come from.