1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 128Get this manual
CRANKCASECRANKSHAFTITRANSMISSION Backlash is changed by about 0.06 mm (0.002 in) hen the thickness of the shim is changed by 0.10 mm (0.004 in)OUTPUT DRIVEN GEAR SHAFT ADJUSTMENT SHIMS :
A: .40 mm to.016 inJ
B: .45 mm (0 .018 inl
C: .50.55 E: .60 F: .30 G: .35
mm (0 .020 inJ Standard
mm (0 .022 inl mm (0 .024 in)
mrn (0 .01 inJ
OUTPUT DRI VEN GEA DI SASSEMBLY
Place the output gear case in vise, being careful not to distort it, and remove the oil seal
(1) OIL SEAL