Installing The Valves - Yamaha R1 Series 2015 Service Manual

valve spring and valve spring seat as a set.
• When installing the valve spring and valve
spring seat, be sure to install them onto
their original positions.
The following procedure applies to all of the
valve lifters.
1. Check:
• Valve spring seat
Damage/scratches
spring seat and valve spring as a set.
EAS30288

INSTALLING THE VALVES

The following procedure applies to all of the
valves and related components.
1. Deburr:
• Valve stem end
(with an oil stone)
2. Lubricate:
• Valve stem "1"
• Valve stem seal "2"
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
Replace the valve
5-33
VALVES AND VALVE SPRINGS
3. Install:
• Valve spring seat "1"
• Valve stem seal "2"
• Valve "3"
• Valve spring "4"
• Valve spring retainer "5"
(into the cylinder head)
TIP
• Make sure each valve is installed in its original
place.
• Install the valve springs with the larger pitch "a"
facing up.
3
b. Smaller pitch
4. Install:
• Valve cotters
TIP
Install the valve cotters by compressing the
valve spring with the valve spring compressor
"1" and the valve spring compressor attachment
"2".
New
5
4
2
1