Yamaha YZ125 2019 Owner's Service Manual page 188

6. Adjust:
• Rebound damping force
Turn in the damping adjuster "1" finger-tight
and then turn out to the originally set position.
7. Adjust:
• Compression damping force
Turn in the damping adjuster "1" finger-tight
and then turn out to the originally set position.
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FRONT FORK