Yamaha R1 Series 2015 Service Manual page 423

stall the piston assembly into the cylinder from
underneath.
• Install the piston assembly into the cylinder so
that the piston ring end gap is aligned with the
cylinder skirt "a".
10.Install:
• Cylinder gasket
New
• Dowel pins
• Cylinder assembly
• Connecting rod caps
• Connecting rod bolts
TIP
• Make sure the "Y" or " " marks "a" on the con-
necting rods face towards the left side of the
crankshaft.
• Make sure that the projection "b" on the con-
necting rod cap faces the same direction as the
"Y" or " " mark "a" on the connecting rod.
b
11.Tighten:
• Connecting rod bolts "1"
CONNECTING RODS AND PISTONS
1
a
2
a
1
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
TIP
Tighten the connecting rod bolts using the fol-
lowing procedure.
a. Tighten the connecting rod bolts with a torque
wrench.
Connecting rod bolt (1st)
25 Nm (2.5 m·kgf, 18 ft·lbf)
b. Put a mark "1" on the corner of the connecting
rod bolt "2" and the connecting rod cap "3".
c. Tighten the connecting rod bolts further to
reach the specified angle 175 –185 with
torque wrench, and then confirm that the
torque value is within the range of 40 Nm (4.0
m·kgf, 29 ft·lbf) to 85 Nm (8.5 m·kgf, 61 ft·lbf)
with keeping the torque wrench 175 –185 . If
torque is out of range, replace the connecting
rod bolt to new one and repeat from step a.
Connecting rod bolt (final)
Specified angle 175 –185
EWA16610
WARNING
If the bolt is tightened more than the speci-
fied angle, do not loosen the bolt and then re-
tighten it. Instead, replace the bolt with a new
one and perform the procedure again.
d. After the installation, check that the section
shown "a" is flush with each other by touching
the surface.
5-82
180˚