Yamaha RAPTOR YFM660R Owner's Manual page 104

1. Adjusting nut 2. Locknut
1. Écrou de réglage 2. Contre-écrou
1. Anillo de ajuste 2. Contratuerca
A. Spring length
A. Longueur du ressort
A. Longitud del muelle
Adjust the spring preload as follows.
NOTE:
_
A special wrench can be obtained at a Yamaha
3. Special wrench
dealer.
3. Clé spéciale
3. Llave especial
_
_
Always tighten the locknut against the adjust-
ing nut, then tighten it to the specified torque.
4-39
_
1. Loosen the locknut.
2. Turn the adjusting nut in direction a to in-
crease the spring preload and in direction b
to decrease the spring preload.
3. The length of the spring (installed) changes
1.5 mm per turn of the adjusting nut.
Measurement A:
Installed length:
Minimum (hard): 232 mm
Standard: 240 mm
Maximum (soft): 247 mm
4. Tighten the locknut to the specified torque.
Tightening torque:
42 Nm (4.2 m·kgf)
CAUTION: