83 GS450 cam timing

[fieroaddiction]

The cams are installed correctly, the notches on the ends do face each other at #1 TDC. I checked the valve clearances with the corresponding piston at TDC, that is the correct procedure isn't it?

I had checked the air filter before, but I failed to notice the metal screen below the foam element is partially plugged up. I will remove the airbox and retest. Then I'll kick myself in the head if that was the problem.