u/Ancient-Bathroom6701

First time doing timing on my KX250F 07 after installing valves. First problem is when I put the chain tensioner on and activate it, my flywheel and cam timing just do not align, no matter what I have tried anyone have any tips for this? It would be appreciated. The second problem is just whether this is correctly timed, and which flywheel marks should be in the middle if I'm not doing that right.