2001-2003 Honda TRX500FA Factory Service Manual, Page 138Get this manual
CYLINDER HEADVALVE VALVE SPRING
Measure the alv spr ing fr ee lengt h
SERVICE LIMITS: Inner: 37.8 mm 1.49 in l
Out r: 49.0 mm 11.93 lnl
VAl VEflAl VE GUIDE
Check that th alve moves smooth ly in the gu ideCheck the alv for bend ingburning or abnormal wearMeasure each va lve stem a.Dand reco rd itSERVICE LIMITS: IN5.45 mm (0.215 inl EX :5.43 mm (0.2 14 in )
Ream the va lve gu ide rem ove any car bo bu ild-up bef ore measuring the guideInsert the reamer from the combus ti on chamber side of the head and always rotate he ream er clockwise