Installing The Valves - Yamaha FT50C Service Manual

Installing the valves

1. Install the new valve stem seal 1 to the
valve guide, and then apply engine oil to
the valve guide.
1
E
2. Install the valve 2, spring seat 3, valve
spring 4, and spring retainer 5 in the
sequence shown, and then attach the
special service tool.
NOTE:
Face the fine pitch side a of the valve spring
toward the spring seat.
Valve spring compressor 6:
90890-04019
Valve spring compressor attachment
7:
90890-06320
62Y5A11
3. Compress the valve spring, and then
install the valve cotter 8 using a thin
screwdriver with a small amount of
grease applied to it.
S62Y5590
4. Lightly tap the spring retainer with a plas-
tic hammer to set the valve cotter
securely.
Cylinder head
5-32
1
2
3
4
5
6
7
8
9