1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 62Get this manual
CYLINDER HEADV ALVES Turn the flyw heel clockwise and remove the cam sprocket bolts and cam sprocket(21 CAM SPROCKET BOLT
Remove the camshaftSuspend he cam chain with piece of wire to prevent it from falling into the crank case
Remove the camshaft end cap
INSPECTION
Using micrometer, measure the height of eac cam lobe and
inspect it for wear or damageSERVICE LIMITS ;
36 .026 mm1.4183 inl
Ellhaust: 35.897 mm (1 .4133 in)
Measure the camshaft journal 0.0