Scooter Valve adjustment wont take?!?!

[99owned]

Ok, so I know how to do the valve adjustment....

But when I do it...

If you turn the motor over at all, they loosen up or get really tight. I've attempted 12 times now.

Have no clue what to do

Anyone know what I could be doing wrong? Need new valves? The scoot really needs the adjustment, If I just leave it like that, wont run for crap, and it just tick like crazy