Yamaha RS90K Manuel D'atelier page 258

Ski alignment
NOTE:
Be sure to verify the spring preload setting before adjusting the ski toe-out since this adjustments may affect
the ski toe-out setting.
Point the skis straight forward and measure the amount of ski toe-out.
È Ski toe-out:
0 ~ 15 mm (0 ~ 0.59 in)
a – b = Toe-out
Refer to "STEERING SYSTEM" in CHAPTER 2.
FRONT SUSPENSION
3-23
CHAS