2003 Honda ATV TRX650FA Rincon Factory Service Manual, Page 156Get this manual
CYLINDER HEADIVALVECAMSHAFT VA LVE SPRING
Measu re the valve spring free length SERVICE LIMITS: Inn er36.3 mm 11 .43 in)
Ou ter: 43 .1 mm (1.70 in)
VALVEVALVE GUIDE
Check hat he va lve moves smoothly in he gu ide Check he valve for bend ingbu rn ing or ab norm al
wearMeasu re each alve stem .0 and record it
SERVICE LIMITSIN: 5.45 mm 0.215 inEX: 5.43 mm (0.214 in)
Ream he alve guide to remo ve any ca rbon bu ildup befo re easur ing th ui deInsert the rea mer from the com bustion ham ber side of th cylinder head and always rotate th rea mer clockwise