1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 73Get this manual
FRONT AND REAR SHOCK ABSORBER ADJUSTMENT
Standard spring length: (Installed): 228.5 mm (9.0 in) Minimum length (Installed): 220.5 mm (8.7 in) Maximum length (Installed): 235.5 mm (9.3 in)
NOTE:One complete turn of the adjuster will change the preload 1.5mm(O.06in)Make changes in increments of 3mm(O.12in) at time