2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 312Get this manual
FRONT DRIVING MECHANISM (FMFE models) Replace the pinion shim with thinner one if the contact pattern is too low, toward the flankThe pattern will shift about 0.51.0 mm (0.020.04 in) when the thickness of the shim is changed by 0.12 mm (0.005 in)NOTE: Fifteen different thickness shims are available from the thinnest (1.64 mm thickness: A) shim to the thickest (2.48 mm thickness: O) in intervals of 0.06 mmPinion gear shims: A: (thinnest): 1.64 mm (0.065 in) G: (standard): 2.00 mm (0.079 in) O: (thickest): 2.48 mm (0.098 in) For pinion shim replacement, see page 16-22 and page 16-26FLANK Drive side FLANK Coast side TOO LOW: PINION GEAR SHIM
DIFFERENTIAL INSPECTION
Install the inspection tools into both sides of the differentialTOOL: Differential inspection tool 07KMK-HC50101 or 07KMK-HC5010A (U.S.Aonly) DIFFERENTIAL