Yamaha R1 Series 2015 Service Manual page 421

• 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"
TIP
• Apply engine oil onto the piston pin.
• Make sure that the "Y" or " " mark "a" on the
connecting rod faces left when the punch mark
"b" on the piston is pointing up as shown.
• Reinstall each piston into its original cylinder.
2
3
5. Install:
• Piston pin clip "1"
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the piston pin clip "1" in the piston as
shown in the illustration.
TIP
When installing the first piston pin clip, place oth-
er piston pin "2" under the piston pin as shown in
the illustration.
a b
1
New
CONNECTING RODS AND PISTONS
TIP
Align the piston pin clip end with the position "a".
b. Push the piston pin clip insertion tool "3" in the
direction as shown in the illustration and
place the piston pin clip into the piston pin
bore.
TIP
Push in the piston pin clip insertion tool while
holding it parallel with the upper surface of the
piston and rear surface of the piston pin clip in-
sertion tool.
Piston pin clip insertion tool
90890-04173
YM-04173
c. Install the piston pin clip to the piston by
pressing the portion "b" on the piston pin clip
insertion tool "3" in the direction shown in the
illustration.
5-80
2
a
1
3