Checking The Camshafts - Yamaha YZF-R6 Service Manual

CAMSHAFTS
EAS00204

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 dimensions limit
Intake camshaft
a 33.0 mm
b 25.09 mm
Exhaust camshaft
a 32.50 mm
b 25.02 mm
3. Measure:
S camshaft runout
Out of specification ! Replace.
Max. camshaft runout
0.06 mm
4. Measure:
S camshaft-journal-to-camshaft-cap
ance
Out of specification ! Measure the cam-
shaft journal diameter.
Camshaft-journal-to-camshaftcap
clearance
0.020 X 0.054 mm
<Limit>: 0.08 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.
4-11
ENG
clear-
1 onto the