Yamaha XSR MTM690 2016 Service Manual page 320

• Piston pin "3"
• Piston pin clips "4"
TIP
• Apply engine oil onto the piston pin.
• Make sure that the "Y" mark "a" on the connect-
ing rod faces left when the punch mark "b" on
the piston is pointing up as shown.
• When installing a piston pin clip, make sure
that the clip ends "c" are positioned away from
the cutout "d" in the piston as shown in the illus-
tration.
• Reinstall each piston into its original cylinder.
2
3
New 4
New 4
5. Lubricate:
• Piston
• Piston rings
• Cylinder
(with the recommended lubricant)
Recommended lubricant
Engine oil
6. Offset:
• Piston ring end gaps
New
a
b
1
c
d
CONNECTING RODS AND PISTONS
a,b
a. 2nd ring
b. Lower oil ring rail
c. Upper oil ring rail
d. Top ring
e. Oil ring expander
A. Exhaust side
7. Lubricate:
• Crankshaft pin
• Connecting rod big end bearing inner surface
(with the recommended lubricant)
Recommended lubricant
8. Install:
• Connecting rod assemblies "1"
(into the cylinder and onto the crankshaft pin)
• Connecting rod caps
(onto the connecting rod)
TIP
• While compressing the piston ring with piston
ring compressor "2", install the connecting rod
assembly 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 that the projection "b" on the con-
necting rod cap faces the same direction as the
"Y" mark "a" on the connecting rod.
• Apply Molybdenum disulfide oil to the threads
and seats of the connecting rod bolt.
Piston ring compressor
Piston ring compressor
5-79
A
45˚
45˚
c
d,e
Engine oil
90890-05158
YM-08037
90˚