Checking The Camshafts - Yamaha XJR1300(L) 99 Service Manual

CAMSHAFTS
EAS000204

CHECKING THE CAMSHAFTS

1. Check:
S camshaft lobes
Blue discoloration/pitting/scratches ! Re-
place the camshaft.
2. Measure:
S camshaft lobe dimensions a and b
Out of specification ! Replace the cam-
shaft.
Camshaft lobe dimension limit
Intake/exhaust
a Wear limit <28.15 mm>
b Wear limit <35.85 mm>
3. Measure:
S camshaft runout
Out of specification ! Replace.
Camshaft runout
Less than 0.03 mm
4. Measure:
S camshaft-journal-to-camshaft-cap
ance
Out of specification ! Measure the camshaft
journal diameter.
Camshaft-journal-to-camshaft-
cap clearance
0.020 X 0.054 mm
a. Install the camshaft into the cylinder head
(without the dowel pins and camshaft caps).
b. Position a strip of Plastigauge
camshaft journal as shown.
c. Install the dowel pins and camshaft caps.
NOTE:
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 .
Camshaft cap bolt
12 Nm (1.2 mSkg)
d. Remove the camshaft caps and then mea-
sure the width of the Plastigauge
4-10
ENG
clear-
1 onto the
2 .