Yamaha RS90K Manuel D'atelier page 488

VALVES AND VALVE SPRINGS
NOTE:
• Make sure each valve is installed in its original
• Install the valve spring with the larger pitch a fac-
b Smaller pitch
2
NOTE:
Install the valve cotters by compressing the valve
spring with the valve spring compressor set 2 and
3
attachment 3.
1
Hitting the valve tip with excessive force could
damage the valve.
5-35
3. Install:
• Lower spring seat 1
• Valve stem seal 2
• Valve 3
• Valve spring 4
• Upper spring seat 5
(into the cylinder head)
place.
ing up.
4. Install:
• Valve cotters 1
Valve spring compressor set:
90890-04019, YM-04019
Attachment:
90890-04108, YM-04108
5. To secure the valve cotters onto the valve stem,
lightly tap the valve tip with a soft-face hammer.
CAUTION:
ENG