Honda XR125LK Owner's Manual page 99

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CYLINDER HEAD/VALVES
Remove the cam sprocket bolts [1].
Be careful not to let
Remove the cam sprocket [2] off the camshaft flange
the sprocket bolts
and cam chain [3].
fall into the
Attach a piece of wire to the cam chain to prevent it
crankcase.
from falling into the crankcase.
Remove the bolt [1] and camshaft retainer plate [2].
Be careful not to let
Remove the camshaft [3] from the camshaft holder.
the bolt and plate
fall into the
crankcase.
INSPECTION
Turn the outer race of each camshaft bearing [1] with
your finger. The bearings should turn smoothly and
quietly.
Also check that the bearing inner race fits tightly on the
camshaft.
Replace the camshaft assembly if the bearing does not
turn smoothly, quietly, or if they fit loosely on the
camshaft.
Measure the height of each cam lobe.
SERVICE LIMITS: IN: 32.96 mm (1.298 in)
Inspect the cam lobes for damage or excessive wear.
Check the rocker arm if each cam lobe are worn or
damaged.
INSTALLATION
Lubricate the camshaft bearings with engine oil.
Apply molybdenum oil solution to the cam lobes.
Install the camshaft [1] with its tab [2] facing up.
8-6
EX: 32.85 mm (1.293 in)
[1]
[2]
[2] [1]
[1]
[3]
[3]
[2]
[1]