Honda WB20XT2 Manual page 116

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WB20XT2•WB30XT2
PISTON
DISASSEMBLY/ASSEMBLY
Remove the piston. (page 13-4).
PISTON RING SET (Entire surface)
INSTALLATION:
To install the oil ring, install the spacer (1) first,
and then install the side rails (2).
Be sure that the top ring (3) and second ring (4)
are not interchanged.
Install the top ring and second ring on the piston
with the maker mark side facing up.
Check that the piston rings rotate smoothly after
installing them.
Space the piston ring end gaps 120° apart, and
do not align the ring end gaps with the piston pin
bore.
PISTON PIN CLIP (2)
INSTALLATION:
Install by setting one end of the piston pin
clip in the groove of the piston pin bore,
holding the other end with long needle nose
pliers, and rotating the clip in.
Do not align the end gap (1) of the piston pin
clip with the cutout (2) of the piston pin bore.
(1)
(2)
TOP RING
(3)
(4)
(2)
SPACER
(1)
(2)
PISTON PIN
(Outer surface)
120°
120°
120°
10 mm (0.4 in)
SIDE RAIL
10 mm (0.4 in)
LONG END
CRANKCASE
MAKER MARK
SECOND RING
SIDE RAIL
OIL RING
(COMBINATION RING)
MARK
PISTON
CONNECTING ROD UPPER
(Small end bearing)
INSTALLATION:
Set the connecting rod upper with
the long end toward the mark on
the piston head.
13-5