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9-4-2 PISTON AND PISTON RING
(1) If a ring expander is not available, set the ring joint at the first land of the piston, as shown
in Fig. 9-4-4. Then, open the joint wide so that the ring can be slid into the fegular groove.
Note: Be careful not to twist or expand each ring too excessively. The oil ring is fitted onto the
piston, followed by the second ring and top ring.
F&. 9-43
Top Ring
Second Ring
Oil Ring
Fig. 9-4-4
(2) The connecting rod is joined to the
piston with the piston pin.
Note: Prior to assembly, apply sufficient lub-
ricating oil, to the connecting rod
minor edge.
Note: Be sure to secure the clips to both sides
of the piston pin.
(3) In setting the connecting rod, hold it
with a piston ring guide, as shown in Fig.
9-4-5, (or, if there is no ring guide, tap
the piston head with a wooden object
pressing the piston ring with a finger tip
to push it in).
Set it to the position of
the @ mark or MA mark of the connect-
ing rod in the flywheel magneto side.
Note: Prior to assembly, apply sufficient
lubricating oil to the piston ring, con-
necting rod metal, and cylinder wall.
Note: Fit the piston with the piston rings
arranged 90* from the periphery of the
piston.
Piston Ring Guide
F&T 94-5
-50-