Honda WB20XT2, Manual

Page: 116 / 132

13-5
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WB20XT2•WB30XT2 CRANKCASE
PISTON
DISASSEMBLY/ASSEMBLY
Remove the piston. (page 13-4).
PISTON
CONNECTING ROD UPPER
INSTALLATION:
Set the connecting rod upper with
the long end toward the mark on
the piston head.
LONG END
SIDE RAIL
SPACER
PISTON PIN CLIP (2)
PISTON PIN
TOP RING
SECOND RING
MAKER MARK
10 mm (0.4 in)
120°
120°
120°
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.
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.
SIDE RAIL
MARK
10 mm (0.4 in)
(Small end bearing)
(Outer surface)
(1)
(2)
PISTON RING SET (Entire surface)
(3)
(4)
(2)
(1)
(2)
OIL RING
(COMBINATION RING)