Yamaha RX10LTGTYL, Service Manual

Page: 1329 / 1664

5-12
CAMSHAFTS
ENG
NOTE:
Measurement steps:
S
Install the camshaft into the cylinder head
(without the dowel pins and camshaft caps).
S
Position a strip of Plastigauge

1 onto the
camshaft journal.
S
Install the dowel pins and camshaft caps.
S
Tighten the camshaft cap bolts in stages and in
a crisscross pattern, working from the inner
caps out.
S
Do not turn the camshaft when measuring the
camshaft journal-to-camshaft cap clearance
with the Plastigauge

.
Bolt (camshaft cap):
10 Nm (1.0 m
S
kg, 7.2 ft
S
lb)
S
Remove the camshaft caps and then mea-
sure the width of the Plastigauge

1 .
5. Measure:
S
Camshaft journal diameter
a
Out of specification
!
Replace the cam-
shaft.
Within specification
!
Replace the cylinder
head and the camshaft caps as a set.
Camshaft journal diameter:
24.459
X
24.472 mm
(0.9630
X
0.9635 in)
6. Inspect:
S
Camshaft sprocket
More than 1 / 4 tooth
a
wear
!
Replace the
camshaft sprockets and the timing chain as a
set.
a 1/4 tooth
b Correct
1 Timing chain roller
2 Camshaft sprocket
7. Inspect:
S
Timing chain guide (exhaust side
1
and top
side 2 )
Damage / wear
!
Replace the timing drain
guide.