3-11
3
Top-Side Components
NOTE: For efficiency, it is preferable to remove
and disassemble only those components which
need to be addressed and to service only those
components. The technician should use discretion
and sound judgment.
NOTE: The engine/transmission must be
removed to service the rear cylinder head, cylin-
der, and piston.
Removing Top-Side
Components
A. Valve Cover/Rocker Arms
B. Cylinder Head/Camshaft
1. Remove the timing inspection plug, spark plugs,
and magneto housing cover; then install the 10
mm cap screw (left-hand threads) in the crankshaft
and rotate the desired cylinder to top-dead-center
of the compression stroke.
GZ027
GZ026
NOTE: Timing marks on the rotor/flywheel are
stamped with an “F” (front cylinder) and “R” (rear
cylinder) adjacent to the mark.
GZ063
GZ059
2. Remove the tappet covers on the cylinder being
serviced. The tappets should not have pressure on
them.
3. Remove the cap screws securing the valve cover to
the head; account for the four rubber washers on
the top side cap screws. Remove the valve cover.
Account for and note the orientation of the cam-
shaft plug. Note the location of two alignment
pins.
AT THIS POINT
To service any one specific component, only limited
disassembly of components may be necessary. Note
the AT THIS POINT information in each sub-section.
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