Yamaha FT50C - Checking the Valve Springs; Checking the Valves

POWR
Power unit
5-25
62Y5A11
5. Remove the retaining bolt
4
, then the
camshaft
5
by pulling it downward.
6. Remove the intake valve and exhaust
valves.
NOTE:
• Be sure to keep the valves and other parts
in the order that they were removed.
• When replacing the valve, also replace the
valve guide and stem seal.
Checking the valve springs
1. Measure the valve spring free length
a
.
Replace if out of specification.
2. Measure the valve spring tilt
b
. Replace
if out of specification.
Checking the valves
1. Check the valve face for pitting or wear.
Replace if necessary.
2. Measure the valve margin thickness
a
.
Replace if out of specification.
Valve spring compressor
6
:
90890-04019
Valve spring compressor attachment
7
:
90890-06320
Valve spring free length limit
a
:
37.85 mm (1.490 in)
Valve spring tilt limit
b
:
1.7 mm (0.07 in)