2001-2003 Honda TRX500FA Factory Service Manual, Page 289Get this manual
FRONT DRIVING MECHANISM PINION GEAR BEARING AND SHIM REPLACEMENT Pull th pin io beari ng from th shaft with comme rcially available bearing pullerRemove he pi nio shim
BEARING
Install the shim and new beari ng on to the pi nion gea ith th bearing mark faci ng outNOTE: Wh en the gea set, rin gea bea rin g, di fferenti al housing ando ge ar case has been replaced use 2.00 mm (0.79 inthick shim for ini tial reference