1983-1985 Original Honda ATC 200X Shop Manual, Page 56Get this manual
CYLINDER HEADVALVES
Using micrometer, measure each cam height and check it for wear or damageSERVICE LIMIT: INTAKE: 32.057 mm (1.2621 in) EXHAUST: 31.821 mm (1.2528 in)
CYLINDER HEAD REMOVAL
Remove the engine from the frame (Section 5)Remove the mm bolt and socket bolts first and then remove the mm cap nuts attaching the cylinder head cover and cylinder headRemove the cylinder head cover