1983-1985 Original Honda ATC 200X Shop Manual, Page 62Get this manual
CYLINDER HEADVALVES VALVE GUIDE REAMER 07984-0980000 Ream the new valve guide after installationNOTE: operation
i Rotate the reamer in the cutting direction
inserting and itClean the cylinder head thoroughly to remove any metal particlesReface the valve seat
VALVE SEAT INSPECTIONREFACING
Clean all intake and exhaust valves thoroughly to remove carbon depositsApply light coating of Prussian Blue to each valve seatLap each valve and seat using rubber hose or other hand lapping toolRemove the valves and measure their face contact widthSERVICE LIMIT: 2.0 mm (0.08 in)