Installing The Valves - Yamaha F80BETL Service Manual

POWR
2. Check the cylinder head warpage using a
straightedge 1 and thickness gauge 2
in the directions shown. Replace if above
specification.
2
Cylinder head warpage limit:
0.1 mm (0.0039 in)

Installing the valves

1. Install a new valve seal 1 onto the valve
guide.
E
2. Install the valve 2, valve spring seat 3,
valve spring 4, and valve spring retainer
5 in the sequence shown, and then
attach the special service tools.
5-33
Power unit
1
S6D85470
S6D85460
S60C5660
NOTE:
The valve spring can be installed in any
direction.
Valve spring compressor 6:
90890-04019
Valve spring compressor attachment
7:
90890-06320
3. Compress the valve spring, and then
install the valve cotters 8 using a thin
screwdriver with a small amount of
grease applied to it.
6D93G11