Yamaha RX10K Supplementary Service Manual page 296

VALVES AND VALVE SPRINGS
INSTALLATION
1. Deburr:
S Valve stem end
(with an oil stone)
2. Lubricate:
S Valve stem 1
S Valve stem seal 2
(with the recommended lubricant)
3. Install:
S Valve 1
S Lower spring seat 2
S Oil seal 3
S Valve spring 4
S Upper spring seat 5
(into the cylinder head)
NOTE:
Install the valve spring with the larger pitch a
facing up.
Smaller pitch
NOTE:
Make sure that each valve is installed in its origi-
nal place. Refer to the following embossed
marks.
Right and left intake valve(-s): "4XV:"
Middle intake valve(-s): "4XV."
Exhaust valve(-s): "5LV"
5-29
ENG
Recommended lubricant
Molybdenum disulfide oil
b