Yamaha VK540EF Service Manual page 134

REAR SUSPENSION
Extension spring preload
1. Adjust:
S Extension spring preload
Adjuster
A
Preload
Snow Condition
Standard
Length B
CAUTION:
Be sure the left and right spring preload is
same.
2-45
INSP
ADJ
Turn in Turn out
Harder Softer
Icy Soft
16 mm (0.63 in) 16 mm (0 63 in)