Checking The Rocker Arm; Checking The Push Rod; Checking The Cylinder Head - Yamaha MZ360 Service Manual

CYLINDER HEAD COVER, CYLINDER HEAD

CHECKING THE ROCKER ARM

1.
Check:
• Rocker arm
• Wear/damage/cracks  Replace.

CHECKING THE PUSH ROD

1.
Check:
• Push rod runout
Runout limit:
0.15 mm (0.0059 in)
Out of specifications  Replace.

CHECKING THE CYLINDER HEAD

1.
Check:
• Cylinder head combustion chamber
Check the combustion chamber for carbon depos-
its.
Any carbon deposits  Eliminate.
TIP
Be sure not to damage the contact surface of the cylinder.
2.
Check:
• Cylinder head
Cracks/damage around the hole of spark plug 
Replace.
3.
Measure:
• Cylinder head warpage
TIP
Measure the warpage on the contact surface of the cylin-
der head at six points using the straight edge and thick-
ness gauge.
Warpage limit:
0.05 mm (0.002 in)
Out of specifications  Resurface or replace.
3-35
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