Yamaha Scorpio Service Manual page 47

VALVE CLEARANCE ADJUSTMENT/
IDLING SPEED ADJUSTMENT
G
Measure the valve clearance by using a
feeler gauge.
Out of specification → Adjust clearance.
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5.Adjust:
Valve clearance
G
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Adjustment steps:
Loosen the locknut 1.
G
Turn the adjuster 2 in or out with the tappet
G
adjusting tool 3 until specified clearance is
obtained.
Valve clearance is
Turning in
decreased.
Valve clearance is
Turning out
increased.
Tappet adjusting tool:
90890-01311
G
Hold the adjuster to prevent it from moving
and tighten the locknut.
G
Measure the vale clearance.
G
If the clearance is incorrect, repeat above
steps until specified clearance is obtained.
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6.Install:
O-ring
G
Tappet cover (intake side)
G
IDLING SPEED ADJUSTMENT
1.Start the engine and let it warm up for sev-
eral minutes.
2.Attach:
Engine tachometer to the spark plug lead.
G
Engine tachometer:
90890-03113
3 - 5
INSP
ADJ
14 Nm (1.4 m • kg)
18 Nm (1.8 m • kg)