ENGINE TOP END 4-17
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Piston Installation Notes
*Oil Ring Installation:
OFirst install the expander in the piston oil ring groove so that the
explander ends butt together.
0 Install the upper and lower steel rails. There is no UP or Down to the
rails. They can be installed either way.
A. Expander ends
l install the chrome-plated top ring and second ring with “N” mark
facing up. The rings should turn freely in the grooves.
@Align the piston and rings with the piston ring end gap as shown.
1. Arrow Mlatch Mark
2. Top Ring End Gap, Upper Side Rail End Gap
3. 45”
4. Second Ring End Gap, Lower Side Rail End Gap
l
Apply engine oil to the piston pins.
*Assemble the pistons onto the connecting rods as follow:
B
No. 1 Cyl. piston, align the arrow match mark on the piston head with
Q
E
Pa
the raised letters (MADE IN JAPAN) on the connecting rod.
No. 2 Cyl. piston, align the arrow match mark on the piston head with
opposite MADE IN JAPAN on the connecting rod.
A. No. 1 Cyl. Piston
D. MADE IN JAPAN
6. No. 2 Cyl. Piston E. Opposite MADE IN JAPAN
C. Arrow Match Marks
l When in.stalling a piston pin snap ring, compress it ortly enough to
install it and no more.
OFit a new piston pin snap1 ring into the scde of the piston so that the
ring opening (A) does not coincide with the notch (B) in the edge of
the piston pin hole.
reuse snap rings, as removal weakens and deforms
ouf and score the cylinder wall.
@Apply engine oil to the piston skirt and the cylinder bore.
0 Using the piston ring comlpressor grip (special tool: 57001-l 095) and
the belt (special tool: 570’01 -1097). insert the piston and connecting
rod into the cylinder.
0 Insert the piston and connecting rod so that the arrow match mark on
the top of the piston facing the flywheel side.
A. Arrow Match Mark
B. Flywheel Side
No. 1. Cylinder Shown
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