Suzuki RA410, Manual

Page: 320 / 761

1) Install piston pin to piston (1) and connecting rod (2):
After applying engine oil to piston pin and piston pin holes in pis-
ton and connecting rod, fit connecting rod to piston as shown in
figure and insert piston pin to piston and connecting rod, and
install piston pin circlips.
NOTE:
Circlip should be installed with its cut part facing either up
or down as shown in figure.
The oil hole should
come on intake side
Arrow mark
2
2) Install piston rings to piston:
As indicated in figure at the left, 1st and 2nd rings have “RN”,
“T” or “R” mark respectively. When installing these piston
rings to piston, direct marked side of each ring toward top of
piston.
1st ring differs from 2nd ring in thickness, shape and color of
surface contacting cylinder wall.
Distinguish 1st ring from 2nd ring by referring to figure.
When installing oil ring, install spacer first and then two rails.
1. 1st ring
2. 2nd ring
3. Oil ring
3) After installing three rings (1st, 2nd and oil rings), distribute their
end gaps as shown in figure.
1. Arrow mark
2. 1st ring end
gap
3. 2nd ring end
gap and oil ring
spacer gap
4. Oil ring upper
rail gap
5. Oil ring lower
rail gap
6. Intake side
7. Exhaust side
INSTALLATION OR CONNECTION
1) Apply engine oil to pistons, rings, cylinder walls, connecting rod
bearings and crankpins.
NOTE:
Do not apply oil between connecting rod and bearing or be-
tween bearing cap and bearing.
2) Install guide hoses over connecting rod bolts.
These guide hoses protect crankpin and threads of rod bolt from
damage during installation of connecting rod and piston assem-
bly.
ENGINE MECHANICAL 6A4-61