2003 Kawasaki KLF250 Service Manual., Page 181Get this manual
11-14 FINAL DRIVE Output Bevel Gear Case
up dial gauge [A] against Setto check gear backlashthe driven gear shaft nut [B] the To measure the backlash, turnwhile shaft clockwise and counterclockwise [C] slightly holding the output drive gear steadyThe difference between the highest and lowest gauge reading is the amount of backlashTo hold the output drive gear steady, hold the shift drum at the full-turned positionIf the backlash is not within the limit, replace the shim(s) at the drive andor driven gearChange the thickness little at timeRecheck the backlash, and readjust as necessary
Bevel Gear Backlash (Front) 0.06 0.13 mm Standard: (0.0024 0.0051 in (at driven gear shaft nut)
Tooth contact adjustment Clean any dirt and oil off the bevel gear teethApply checking compound to or teeth on the output driven bevel gear