Yamaha XSR 900 2022 Service Manual page 295

3. Install:
• Oil ring expander "1"
• Lower oil ring rail "2"
• Upper oil ring rail "3"
• 2nd ring "4"
• Top ring "5"
(into the piston)
TIP
Be sure to install the piston rings so that the
manufacturer's marks or numbers "a" face up.
4. Install:
• Piston "1"
(onto the respective connecting rod "2")
• Piston pin "3"
• Piston pin clip "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.
• Make sure that the clip ends "c" are positioned
away from the cutout "d" in the piston as shown
in the illustration.
• Reinstall each piston into its original cylinder.
New
CONNECTING RODS AND PISTONS
2
New
G089013
5. Lubricate:
• Piston
• Piston ring
• Cylinder
(with the recommended lubricant)
Recommended lubricant
6. Offset:
• Piston ring end gap
a. Top ring
b. 2nd ring
c. Upper oil ring rail
d. Oil ring expander
e. Lower oil ring rail
A. Exhaust side
5-78
a
3
d
4 New
Engine oil
90˚
b,e
c
a,d
45˚
New
1
b
c
90˚