Yamaha R1 Series 2015 Service Manual page 420

1. Install:
• Big end bearings
• Connecting rod cap
(onto the connecting rod)
TIP
• Clean the big end bearings, crankshaft pins,
and the connecting rods with oil cleaner, and
then wait five minutes to dry the remaining oil
cleaner component.
• When cleaning the connection rod, clean the
bearing surface "a" of the connecting rod bolt
and threads "b".
• Be sure to reinstall each big end bearing in its
original place.
• Align the projections "c" on the big end bear-
ings with the notches "d" in the connecting rods
and connecting rod caps.
• Make sure that the projection "e" on the con-
necting rod cap faces the same direction as the
"Y" or " " mark "f" on the connecting rod.
a
d
e
b
c
f
CONNECTING RODS AND PISTONS
2. Tighten:
• Connecting rod bolts
ECA18390
NOTICE
Tighten the connecting rod bolts using the
plastic-region tightening angle method. Al-
ways install new bolts.
TIP
• Install by carrying out the following procedures
in order to assemble in the most suitable con-
dition.
• Install the new connecting rod bolt without
cleaning and without any oil.
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a. Replace the connecting rod bolts with new
ones.
b. After installing the big end bearing, assemble
the connecting rod and connecting rod cap
without installing them onto the crankshaft.
c. Tighten the connecting rod bolt while check-
ing that the sections shown "a" and "b" are
flush with each other by touching the surface.
Connecting rod bolt
TIP
To install the connecting rod cap, care should be
taken not to install it at an angle and the position
should not be out of alignment.
a. Side machined face
b. Thrusting faces
d. Loosen the connecting rod bolt, remove the
connecting rod and connecting rod cap and
install these parts to the crankshaft with the
big end bearing kept in the current condition.
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3. Install:
• Oil ring expander "1"
• Lower oil ring rail "2"
• Upper oil ring rail "3"
5-79
New
30 Nm (3.0 m·kgf, 22 ft·lbf)
b
a