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When the intake valve starts to close set the exhaust valve.

When the exhaust valve starts to open set the intake valve.

Just go cylinder by cylinder and tighten the rocker till there is no up and down movement in the pushrod and then tighten the rocker 1/2 of a turn.

This is the easiest way IMO.

Do not tighten the rocker till you cant twist it with your finger.

Carefully tighten the rocker till you get the up and down movement out of the pushrod. and the tighten the rocker 1/4-1 turn I tighten mine 1/2 of a turn.