Yamaha YZFR1W 2007, Service Manual

Page: 278 / 429

CRANKSHAFT
5-78
7. Install:
• Cylinder gasket “2”
8. Install:
• Big end bearings
(onto the connecting rods and connecting
rod caps)
NOTE:
• Align the projections “a” on the big end bear-
ings with the notches “b” in the connecting
rods and connecting rod caps.
• Be sure to reinstall each big end bearing in
its original place.
• Make sure that the characters “c” a on both
the connecting rod and connecting rod cap
are aligned.
9. Tighten:
• Connecting rod bolts
NOTE:
• Install by carrying out the following proce-
dures in order to assemble in the most suit-
able condition.
• First tighten the bolts to 15 Nm (1.5 m·kg, 11
ft·lb)
• Retighten the bolts to 29.4 Nm (3.0 m·kg, 21
ft·lb)
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a. Replace the connecting rod bolts with new
ones.
b. Clean the connecting rod bolts.
c. After installing the big end bearing, assem-
ble the connecting rod and connecting rod
cap once using a single unit of the connect-
ing rod.
d. Tighten the connecting rod bolt while
checking that the sections shown “a” and
“b” are flush with each other by touching
the surface.
NOTE:
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.
e. 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.
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10. Install:
• Piston assemblies “1”
(into the cylinder)
NOTE:
While compressing the piston rings with one
hand, install the connecting rod assembly into
the cylinder with the other hand.
Connecting rod bolt
29.4 Nm (3.0 m·kg, 21 ft·lb)
New
a. Side machined face
b. Thrusting faces (4 places at front and rear)