Yamaha RS Venture RST9NJ Owner's Manual page 47

Spring preload setting*:
Minimum (soft):
16 mm (0.63 in)
Standard:
16 mm (0.63 in)
Maximum (hard):
18 mm (0.71 in)
* Distance A changes 1.25 mm (0.05 in)
with each full turn of the adjusting
nut.
Control functions
41