I have installed new sprockets and a new chain today.. (D.I.D VX2 520)
In the manual it says that the weel should be elevated from the ground when measuring the chain slack.. We did set the chain slack to approx 40-45mm when the back wheel was elevated..

When I tried the bike and sat on it the chain felt very tense, almost no slack at all.. So we loosened the chain again and got more slack.. Now the slack is pretty good when I sit on the bike..

But what is the best way to measure (and adjust) the slack? Is it better to measure the slack when the swingarm is compressed a little bit (the usual when riding the bike..) or should it be quite slack when the suspension isn't compressed and pretty tense when compressed?

We also tried to put first gear in and then move the wheel a little bit backwards so the above part of the chain was quite tense and the lower part was quite loose.. But what is right?

Please guide me!

Thanks in advance!