Yamaha RAPTOR YFM660RR Owner's Manual page 110

1. Spring preload adjusting nut
2. Locknut
1. Écrou de réglage de la précontrainte de ressort
2. Contre-écrou
1. Tuerca de ajuste de precarga del resorte
2. Contratuerca
A. Spring length
A. Longueur du ressort
A. Longitud del muelle
3. Special wrench
3. Clé spéciale
3. Llave especial
Adjust the spring preload as follows.
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.
NOTE:
_
A special wrench can be obtained at a Yamaha
dealer to make this adjustment.
_
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:
_
Always tighten the locknut against the adjust-
ing nut, then tighten it to the specified torque.
4-39
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