Yamaha FJR13AG Service Manual page 421

• Make sure that the "Y" mark "a" on the connect-
ing rod is facing to the left when the punch
mark "b" on the piston is pointing up. Refer to
the illustration.
• When installing a piston pin clips so that the
clip ends are 3 mm (0.12 in) "c" or more from
the cutout in the piston.
• Reinstall each piston into its original cylinder
(numbering order starting from the left: #1 to
#4).
a
2
3
3. Offset:
• Piston ring end gaps
90˚
b,e
a. Top ring
b. 2nd ring
c. Upper oil ring rail
d. Oil ring expander
e. Lower oil ring rail
A. Exhaust side
4. Lubricate:
• Piston
• Piston rings
• Cylinder
(with the recommended lubricant)
CONNECTING RODS AND PISTONS
1
b
c
4
A
c
90˚
a,d
45˚
5-92
Recommended lubricant
Engine oil
5. Lubricate:
• Bolt threads
• Nut seats
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
6. Lubricate:
• Crankshaft pins
• Big end bearings
• Connecting rod inner surface
(with the recommended lubricant)
Recommended lubricant
Engine oil
7. Install:
• Big end bearings
• Connecting rod assembly "1"
(into the cylinder and onto the crankshaft pin)
• Connecting rod cap
(onto the crankshaft pin)
TIP
• Align the projections on the big end bearings
with the notches in the connecting rods and
connecting rod caps.
• Be sure to reinstall each big end bearing in its
original place.
• While compressing the piston rings with piston
ring compressor "2", install the connecting rod
assembly "1" into the cylinder with the other
hand.
• Make sure the "Y" marks "a" on the connecting
rods face towards the left side of the crank-
shaft.
• Make sure the characters "b" on both the con-
necting rod and connecting rod cap are
aligned.
Piston ring compressor
90890-05158
Piston ring compressor
YM-08037