Tracker 600 - Servicing Engine Components

41
LYC020
28. Mark location of piston halve bearings for installa-
tion.
LYC023
Servicing Engine
Components
SPARK PLUG
1. Check spark plug
CYLINDER HEAD COVER
Cleaning and Inspecting
1. The fitting (A) can be removed if needed by remov-
ing circlip. Account for O-ring.
2. Clean cover in parts-cleaning solvent and inspect for
any damage. Replace if damaged.
3. Inspect O-ring on fitting and replace if necessary.
4. Inspect cylinder head gasket, valve cover gasket (C)
and oil cap (B) and replace if any damage.
LYC002
NOTE: Always use new O-rings on three bolts used
to secure cover to cylinder head.
CAM BRIDGE
Cleaning and Inspecting
1. Clean cam bridge in parts-cleaning solvent and
inspect for any damage.
2. Check O-ring.
3. Remove and replace chain guard if damaged
LYC038
NOTE: The cam bridge and cylinder head are ser-
viced as an assembly.
INTAKE AND EXHAUST CAMSHAFTS

NOTE: The camshafts have to be replaced when the
lobes or bearing journals are visibly worn.
Inspecting Intake and Exhaust
Camshaft Bearing Journal
1. Inspect the bearing journal for scoring, seizure
marks, or pitting.
2. If excessive scoring, seizure marks, or pitting is
found, the cylinder head assembly must be replaced.
3. Inspect for wear on sprocket teeth.
NOTE: If the journals are worn, replace the cam-
shaft.
Inspecting Exhaust Camshaft
Spring/Drive Pin
1. Inspect the spring and drive pin for damage.
A
B
C