1986-1988 Honda TRX 200SX Fourtrax Service Manual, Page 61Get this manual
CYLI NDER HEADIV AL VES Measure and record each valve guide ID
SERVICE LIMIT5.52 mm (0.217 in)
Subtract each valv st em .0 from th corresponding gUide IDto obt am the stem-to-guide clea ranc e
SERV ICE LIMITSIN12 mm (0 .005 in) EX.14 mm (0 006 in)
If the stem to-guide clearance exceeds the service limitsde termlne if new guide Wilh tanda rd dimensions would bring the learance ith in to leranceIf soreplace any guides as necessary and ream to fit II the stem-to-guide clearance exceeds th service limi ith new guides alsoreplace the valvesNOTE
Reface the valve sealS whenever the va lve gUides are re placed
VALVE GUIDE REPLACEMENT
Heat the cylinder head to OOc (212 F) With hot plate or oven (1) VALVE GUIDE REMOVER