Yamaha WOLVERINE 450 YFM45FXY Owner's Manual page 34

Turn the adjusting ring in direction (a) to increase
the spring preload and thereby harden the suspen-
sion, and in direction (b) to decrease the spring
preload and thereby soften the suspension.
4
1. Spring preload adjusting ring
2. Position indicator
TIP
A special wrench can be obtained at a Yamaha
dealer to make this adjustment.
1. Special wrench
Spring preload setting:
Minimum (soft):
1
Standard:
2
Maximum (hard):
5
4-15