2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 495Get this manual
REAR DRIVING MECHANISM Replace the pinion shim ith thi cker na it the
co ntac pattern is loa high toward the face
TOO HIGH:
DRIVE SIDE
COA ST SIDE
Repla ce the pin ion shi ith hinne ne if the co ntact pattern is 10 low towar th flank
The patt ern will sh ift about 0.51.0 mm (0.020.04 in) when th thickness he shi is changed by 0,12 (0.005 in )Pin ion gear shims: A: 1.82 mm (0.072 inB: 1,88 mm (0.074 in) C: 1.94 mm 10.07 in2.00 mm (0.079 in) E: 2.06 mm (0.081 in )
F: 2.12 mm (0.08 ln] G: 2.18 mm (0.086 in)