Bridge/Spring Tension Adjustments - Yamaha Electric Guitar Owner's Manual

For best results the bridge should always be adjusted so it is
parallel to the top surface of the guitar as shown in illustration
(below). This position is maintained by opposing tension be-
tween the strings and the claw springs. If you change string
gauge, you will need to readjust the spring tension to return the
bridge back to the parallel position.
The adjustment procedures are:
1) Remove the screws that attach the tremolo cavity back plate
from the back side of the guitar exposing the claw springs.
2) Make sure that the guitar is tuned to proper pitch.
3) If the bridge is tilted forward (up), tighten spring tension by
turning the claw screws clockwise. If the bridge is tilted back
(down), loosen the spring tension by turning the claw screws
counterclockwise.
(illustration — A)
Be sure to check string pitch after each adjustment to the
spring tension.

BRIDGE/SPRING TENSION ADJUSTMENTS

10
A
A
Adjust the height uniformly
using the two screws A.