1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 77Get this manual
CYLINDER HEADIVALVES
VALVE SEAT INSPECTION REFACING
Clean all intake and exhaust valves thoroughly to remove carbon depositsApply II light coating of Prussian Blue to each valve
seatLap each valve and seat using II hand lapping toolRemove and inspect each valve,
STANDARD: IN EX; 1.2-1 .5 mm (0.05-0 .06 in) SERVICE LIMITIN eX1,8 mm (0.07 in)
CAUTION
The valves cannot be groundIf I'Olle face
is bumed or badly won! or if it contacts (he
seat unevenly, replace the vaI'e,