1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 104Get this manual
CLUTCH OIL PUMP
OIL PUMP INSPECTION
Check the oil pump for warpage with straight edge and feeler gaugeSERVICE LIMIT: 0.10 mm (0.004 in)
Measure the pump tip dearanceSERVICE LIMIT: 0.20 mm (0.008 in)