Yamaha YZF-R7 Owner's Service Manual page 144

CAMSHAFTS
EB401401
CHECKING THE CAMSHAFTS
1. Check:
• camshaft lobes
Blue discoloration/pitting/scratches
Replace the camshaft.
2. Measure:
• camshaft lobe dimensions a and b
Out of specification
camshaft.
Camshaft lobe dimensions
limit
Intake camshaft
Exhaust camshaft
3. Measure:
• camshaft runout
Out of specification
Maximum camshaft runout
0.03 mm (0.0012 in)
4. Measure:
• camshaft journal-to-camshaft cap
clearance
Out of specification
camshaft journal diameter.
Camshaft journal-to-camshaft
cap clearance
0.035 ~ 0.069 mm
(0.0014 ~ 0.0027 in)
4 - 12
ENG
Replace the
a 33.31 mm (1.3114 in)
b 24.90 mm (0.9803 in)
a 32.95 mm (1.2972 in)
b 24.936 mm (0.9817 in)
Replace.
Measure the