Checking The Valve Lifters; Installing The Valves - Yamaha Tracer MT09TRAH 2017 Service Manual

2. Measure:
• Valve spring tilt "a"
Out of specification  Replace the valve
spring.
Spring tilt (intake)
1.7 mm (0.07 in)
Spring tilt (exhaust)
1.6 mm (0.06 in)
EAS30287

CHECKING THE VALVE LIFTERS

The following procedure applies to all of the
valve lifters.
1. Check:
• Valve lifter
Damage/scratches  Replace the valve lift-
ers and cylinder head.
EAS30288

INSTALLING THE VALVES

The following procedure applies to all of the
valves and related components.
VALVES AND VALVE SPRINGS
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
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.
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