Checking The Rocker Arm; Checking The Push Rod; Checking The Cylinder Head - Yamaha MZ250 Service Manual

CYLINDER HEAD COVER, CYLINDER HEAD

CHECKING THE ROCKER ARM

1. Check:
9 Rocker arm
Wear/damage/cracks → Replace.

CHECKING THE PUSH ROD

1. Check:
9 Push rod runout
Runout limit:
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
Out of specifications → Replace.

CHECKING THE CYLINDER HEAD

1. Check:
9 Cylinder head combustion chamber
Check the combustion chamber for car-
bon deposits.
Any carbon deposits → Eliminate.
TIP
Be sure not to damage the contact surface of
the cylinder.
2. Check:
9 Cylinder head
Cracks/damage around the hole of
spark plug → Replace.
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ENG