Yamaha YZF-R1 2012, Service Manual

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CONNECTING RODS AND PISTONS
5-80
WARNING
EWA13400
If the connecting rod bolt is tightened more
than the specified angle, do not loosen the
bolt and then retighten it. Instead, replace
the connecting rod bolt with a new one and
perform the procedure again.
ECA13950
Do not use a torque wrench to tighten the
connecting rod bolt to the specified angle.
j. After the installation, check that the section
shown “a” is flush with each other by touch-
ing the surface.
k. Remove the connecting rod and big end
bearings.
l. Measure the compressed Plastigauge®
width on the crankshaft pin.
If the crankshaft-pin-to-big-end-bearing
clearance is out of specification, select
replacement big end bearings.
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2. Select:
• Big end bearings (P1–P4)
TIP
• The numbers “A” stamped into the crank-
shaft web and the numbers “1” on the con-
necting rods are used to determine the
replacement big end bearings sizes.
• “P1”–“P4” refer to the bearings shown in the
crankshaft illustration.
For example, if the connecting rod “P
1
” and
the crankshaft web “P
1
” numbers are “5”
and “2” respectively, then the bearing size
for “P
1
” is:
“P
1
” (connecting rod) - “P
1
” (crankshaft) =
5 - 2 = 3 (brown)
Bearing color code
1.Blue 2.Black 3.Brown
4.Green