Yamaha RS90GTZ Service Manual page 246

CAMSHAFTS
3. Measure:
• Camshaft runout
Out of specification → Replace.
Camshaft runout:
0.030 mm (0.0012 in)
4. Measure:
• Camshaft-journal-to-camshaft-cap
ance
Out of specification → Measure the cam-
shaft journal diameter.
Camshaft-journal-to-camshaft-
cap clearance:
0.028 ~ 0.062 mm
(0.0011 ~ 0.0024 in)
Measurement steps:
• Install the camshaft into the cylinder head
(without the dowel pins and camshaft caps).
• Position a strip of Plastigauge
camshaft journal as shown.
• Install the dowel pins and camshaft caps.
TIP
• Tighten the camshaft cap bolts in stages and
in a crisscross pattern, working from the inner
caps out.
• Do not turn the camshaft when measuring the
camshaft journal-to-camshaft cap clearance
with the Plastigauge
Camshaft cap bolt:
10 Nm (1.0 m•kgf, 7.2 ft•lbf)
• Remove the camshaft caps and then mea-
sure the width of the Plastigauge
5-21
ENG
clear-
®
onto the
®
.
®
.