Installing The Valve - Yamaha F115A Service Manual

POWR
A
VALVES
B
5410
5420
Valve seat cutter set
YM-91043-C / 90890-06803
Valve seat cutter holder
YB-06553 / 90890-06553
Valve seat cutter
(45˚) YB-06555 / 90890-06555
(90˚) YB-06556 / 90890-06556
• Refer to the following chart to deter-
mine the appropriate valve seat cutter.
Valve seat area
A
B
NOTE:
After refacing the valve seat or replacing
the valve and valve guide, lap the valve seat
and valve face.

INSTALLING THE VALVE

1. Install:
• Valve stem seal 1
• Valve 2
• Spring seat 3
• Valve spring 4
• Spring retainer 5
2. Install:
• Valve cotter 6
Valve spring compressor
YM-01253 / 90890-04019
Valve spring compressor adapter
YB-06554 / 90890-06554
NOTE:
Compress the valve spring with the special
tools and install the cotters onto the valve.
5-31
E
Valve seat cutter
90˚
45˚
5