Yamaha 2009 YZF-R1 (Y) Service Manual page 325

• After installing the big end bearing, assemble
the connecting rod and connecting rod cap
without installing them onto the crankshaft.
TIP
Install by carrying out the following procedures
in order to assemble in the most suitable con-
dition.
e. Tighten the connecting rod bolt while
checking that the sections shown "a" and
"b" are flush with each other by touching
the surface.
Connecting rod bolt
30 Nm (3.0 m·kgf, 22 ft·lbf)
TIP
To install the big end bearing, care should be
taken not to install it at an angle and the posi-
tion should not be out of alignment.
a. Side machined face
b. Thrusting faces
f. 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 condi-
tion.
CONNECTING RODS AND PISTONS
TIP
• Do not move the connecting rod or crank-
shaft until the clearance measurement has
been completed.
• Make sure that the projection "a" on the con-
necting rod cap faces the same direction as
the "Y" mark "b" on the connecting rod.
• Make sure the "Y" marks "b" on the connect-
ing rods face towards the left side of the
crankshaft.
g. Tighten the connecting rod bolts with a
torque wrench.
Connecting rod bolt (1st)
h. Put a mark "1" on the corner of the con-
necting rod bolt "2" and the connecting rod
cap "3".
i. Tighten the connecting rod bolts further to
reach the specified angle 145°–155°.
Connecting rod bolt (final)
5-80
20 Nm (2.0 m·kgf, 14 ft·lbf)
Specified angle 145°–155°