2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 312Get this manual
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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 thicknes