I thought I'd give my chain tension a tweak as I'd studiously ignored it for the past 1700 miles. Its nice and easy to do only requiring a 22mm socket, torque wrench for 130 Nm tightening torque and two spanners 10mm and 12mm respectively to nip up the adjuster bolt/lock nut.
But the main reason I'm posting it so that newbies or even seasoned sports bike riders dont make the mistake of checking the tension with the rear unloaded on the centre stand. If you do what appears to be just right tension will be like a bass guitar string once the bikes wieght (note I have the Tenere) is bearing down on the swingarm.
Its quite easy to lunch the gearbox o/p shaft bearings if the chain is run tight so always check with the bike on the ground held upright to be safe.
If i'm teaching granny to suck eggs then apols.

Have you no firewalls that need fixing ??

There was a very lively debate on this a while back, I'm not sure there was ever a firm concensus on the right tension - Manula says one thing, workshop manual says another

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Never underestimate the power of stupid people in large groups.

actually, to be 100% sure the chain is not overtightened it is best to do it with the front sprocket, swingarm axle and rear sprocket are in line. As that is when the distance between front and rear sprocket is largest and hence the chains is stretched most.
If there is just a very little bit of play remaining on the chain the tension is perfect.

On bikes with long suspension this usually translates to a lot more play on the chain when the bike is on centre or side stand than people are used to from sports or naked bikes.