Yamaha F4A - Valve Lifter Inspection

3. Measure:
9Camshaft diameter c
Out of specification ® Replace the
camshaft.
2. Measure:
9Valve lifter outside diameter a
Out of specification ® Replace the
valve lifter.
Valve lifter inspection
1. Inspect:
9Valve lifter
Wear/Damage ® Replace the valve
lifter.
E
CRANKCASE, CRANKSHAFT AND CAMSHAFT
POWR
c
a
5-33
Camshaft diameter (journal):
14.934 ~ 14.984 mm
(0.5880 ~ 0.5889 in)
a
b
2. Measure:
9Camshaft lobe dimensions a and b
Out of specification ® Replace the
camshaft.
Camshaft lobe dimension:
aa
IN : 26.736 ~ 26.836 mm
(1.0526 ~ 1.0265 in)
bb
IN: 21.950 ~ 22.050 mm
(0.8642 ~ 0.8681 in)
aa
EX: 26.532 ~ 26.623 mm
(1.0442 ~ 1.0481 in)
bb
EX: 21.950 ~ 22.050 mm
(0.8642 ~ 0.8681 in)
a
b
Valve lifter
outside diameter:
7.965 ~7.980 mm
(0.3136 ~0.3142 in)