1987 Honda Fourtrax TRX 250X Service Manual, Page 65Get this manual
CYLINDER HEADV ALVES Turn the flywheel counterclockwise and remove the cam sprocket boltsRemove the camshaft end cap
(11 CAM SP'W.CKEl
Remove the cam sprocket end camsha ftSuspend the cam chain with piece of wire to prevent it from falling into the crankcase
INSPECTI ONREPLAC EMENT
Using micrometer, measure the height of each cam lobe and inspect it for wear or damageSERVICE LIMITSINTAKE: 35 .571 mm 11 .40041nl EXHAUST35 .584 mm 11 .40091nl