Yamaha XF50W - ENGINE

ADJUSTING THE VALVE CLEARANCE
EAS00049
ENGINE
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of the
valves.
NOTE:
• Valve clearance adjustment should be made
on a cold engine, at room temperature.
• When the valve clearance is to be measured
or adjusted, the piston must be at top dead
center (TDC) on the compression stroke.
1. Remove:
• front cover
• side cover(left and right)
• battery /battery cover
• single seat/trunk
• footrest board
• Refer to”COVER AND PANEL”.
2. Drain:
• coolant
(completely from the radiator)
3. Remove:
• radiator cover®
• radiator
• fan case®
Refer to”RADIATOR”in chapter 6.
4. Remove:
• spark plug cap
• spark plug
• ignition coil
• cylinder head cover
5. Remove:
• water pump
Refer to”WATER PUMP”in chapter 6.
6. Measure:
• valve clearance
Out of specification -» Adjust.
Valve clearance (cold)
Intake valve
0.10 ~ 0.16mm(0.0039 ~ 0.0063in)
Exhaust valve
0.18 ~ 0.24mm(0.0071 ~ 0.0094in)
3-10
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