Yamaha YFZ 50 2020 Owner's Manual page 41

TIP
A special wrench can be obtained at a Yamaha
dealer to make this adjustment.
1
1. Special wrench
Spring preload setting:
Minimum (soft):
1
Standard:
1
Maximum (hard):
5
EWB00012
WARNING
Indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
5-15
5