2004-2005 660 Yamaha Rhino Factory Service Manual, Page 223Get this manual
MIDDLE GEAR
gnumeral (usually decimal number) on the middle driven pinion gear is either added to or subtracted from "80.5"hnumeral (usually decimal number) on the right crankcase specifies thickness of "97.26"inumeral (usually decimal number) on the left crankcase specifies thickness of "1.66"Example: 1) If the bearing housing is marked "06", is 75.942) If the driven pinion gear is marked "+0", is 60.003) If the driven pinion gear is marked "13", is 80.374) If the crankcase (right) is marked "97.29", is 97.295) If the crankcase (left) is marked "1.67", is 1.676) Therefore, the shim thickness is 0.64 mmB75.94 60.0080.37 97.291.67 0.050.64 7) Round off hundredths digit and select appropriate shim(s)In the example above, the calculated shim thickness is 0.64 mmThe chart instructs you, however, to round off to 5Hundredths 0, 1, 3, 4, 5, 6, 8, Round value 10