2000-2003 Honda TRX350 Rancher factory service manual, Page 273Get this manual
REAR DRIVING MECHANISM If the backlash is excessive, replace the ring gear right side shim with thinner oneIf the backlash is too small, replace the ring gear right side shim with thicker oneBacklash changed by about 0.06 mm (0.002 in) when thickness of the shim is changed by 0.12 mm (0.005 in)
RIGHT SHIM
Eleven different thickness right shims are available from the thinnest (1.26 mm thickness: A) shim to the thickest (1.86 mm thickness: K) in intervals of 0.06 mmNine different thickness left shims are available from the thinnest (1.82 mm thickness: A) shim to the thickest (2.30 mm thickness: I) in intervals of 0.06 mmRight ring gear shims: A: (thinnest)1.26 mm (0.050 in) E: (standard)1.50 mm (0.059 in) K: (thickest)1.86 mm (0.073 in) Left ring gear shims: A: (thinnest)1.82 mm (0.072 in) D: (standard)2.00 mm (0.079 in) I: (thickest)2.30 mm (0.091 in) Change the left side shim and equal thickness and opposite amount of what the right side shim was changed; If the right shim was replaced with 0.12 mm (0.005 in) thicker shim, replace the left shim with one that is 0.12 mm (0.005 in) thinner