2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 256Get this manual
12To remove the output shaft and gear, remove the nut, slide the gear off the shaft (account for shim or shims), and drive the shaft out with plastic mallet (account for shim or shims) Correcting Backlash
NOTE: If backlash measurement is within the acceptable range, no correction is necessary
1If backlash measurement is less than specified, remove an existing shim, measure it, and install new thinner shim2If backlash measurement is more than specified, remove an existing shim, measure it, and install thicker shimNOTE: Continue to remove, measure, and install until backlash measurement is within toleranceNote the following chartBacklash Measurement
Shim Correction
Decrease Shim Thickness Increase Shim Thickness
Under 0.05 mm (0.002 in Over 0.33 mm (0.013 in
At 0.05-0.33 mm (0.002-0.013 in No Correction Required