Piston installation
1. Install:
9
Piston
c
C
9
Make sure that the end gap of each ring
is positioned correctly, then install the
piston.
9
Install the piston with the “UP” mark on
the piston crown facing toward the fly-
wheel rotor side.
A
For USA and CANADA
B
Except for USA and CANADA
E
CRANKCASE, CRANKSHAFT AND CAMSHAFT
POWR
UP
1 2 3
2
45°
±15°
3
5
1
4
2
45°
±1
5°
UP
UP
UP
Piston ring installation
1. Install:
9
Oil ring
1
9
2nd piston ring
2
9
Top piston ring
3
NOTE:
9
Install the oil ring, by first fitting the
expander ring and then installing the side
rail ring.
9
Make sure that the “2N” mark is on the
2nd upper ring to install the piston.
9
When reusing the top ring, be sure to
mark and install in the original upward
position.
9
After installing the piston rings, check
that they move smoothly.
2. Offset the piston ring and oil ring end
gaps as shown.
9
Oil ring end gap
1
(lower rail)
9
Oil ring end gap
2
(expander ring)
9
Oil ring end gap
3
(upper rail)
9
2nd piston ring end gap
4
9
Top piston ring end gap
5
5-36
Piston slider:
YB-34454/90890-06529
A
B
