Yamaha F200B, Service Manual

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7-67
POWR
Power unit
8. Recheck the valve seat contact area of
the valve. See “Checking the valve seat”
(7-64).
Checking the cylinder head anode
1. Check the anodes. Replace if eroded.
Clean if there is grease, oil, or scales.
NOTICE: Do not apply grease, oil, or
paint to the anodes.
Assembling the cylinder head
Do not reuse a valve seal, always replace
it with a new one.
1. Install a new valve seal 1 onto the valve
guide.
2. Install the valve
2
, valve spring seat
3
,
valve spring
4
, and valve spring retainer
5
in this order, and then install the spe-
cial service tools
6
and
7
.
3. Compress the valve spring, and then
install the valve cotters
8 .
4. Tap the valve spring retainer lightly using
a plastic hammer to set the valve cotters
8 securely.
Valve lapper
1
: 90890-04101
1
1
Valve spring compressor
6
: 90890-04019
Valve spring compressor attachment
7
:
90890-06320
6
7
5
4
2
3
8