Yamaha F50A - Assembling the Cylinder Body

62Y3A11
5-64
1
2
3
4
5
6
7
8
I
6. If the oil clearance is below specification,
check the connecting rod bearing color
and clean the contact surface of the con-
necting rod and the connecting rod bear-
ing, and then check the crank pin oil
clearance again.
7. If the oil clearance is over specification,
install an over-sized connecting rod bear-
ing, and then check the crank pin oil
clearance again.
Assembling the cylinder body
1. Assemble the piston
1
, connecting rod
2
, piston pin
3
, and piston pin clips
4
.
NOTE:
• Face the embossed “Y” mark
a
on the
connecting rod in the same direction as the
“UP” mark
b
on the piston.
• Always use new piston pin clips, and do not
allow the piston pin clip end to align with the
piston pin slot
c
.
2. Install the oil ring
5
, second ring
6
, and
top ring
7
to the piston with the “T” mark
d
on the piston rings facing upward.
3. Offset the piston ring end gaps as
shown.
CAUTION:
Do not scratch the piston or break the pis-
ton rings.
NOTE:
After installing the piston rings, check that
they move smoothly.
4. Install the upper half of the bearing into
the connecting rod
2
and the lower half
into the connecting rod cap
8
.
CAUTION:
Install the bearings in their original posi-
tion.
NOTE:
Insert the projection
e
of the bearing into the
slot on the cap and connecting rod.
Cylinder body