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CHK
ADJ
3-14
POWER UNIT
E
(5) Remove the oil pressure gauge.
(6) Install the oil pressure switch.
ADJUSTING THE VALVE CLEARANCE
NOTE:
• Valve clearance adjustment should be
carried out when the engine is "cold".
• Do not adjust the clearance as "remo-
ved cylinder head".
1. Measure:
•
Intake valve clearance
•
Exhaust valve clearance
Out of specification
→
Adjust.
NOTE:
Prior to the adjustment, disconnect spark
plug leads, fuel hoses
, and blow-by
hose
, and also remove flywheel magnet
assembly cover, spark plugs, bolts
, and
cylinder head cover
.
Oil pressure at idling
(at 55 °C (131 °F))
150kPa (1.5kgf/cm
2
, 21psi)
Valve clearance (on cold engine)
Intake valve : 0.2±0.05 mm
(0.008±0.002 in)
Exhaust valve : 0.3±0.05 mm
(0.012±0.002 in)
a
b
1
4
3
2
1
2
3
4
Summary of Contents for F40BMHD
Page 126: ...GENERAL 3 25 E CHK ADJ LUBRICATION POINTS Apply Water resistant grease ...
Page 128: ...CHK ADJ 3 26 GENERAL E ...
Page 129: ...3 26 CHK ADJ F D ES ...
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Page 529: ......
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Page 537: ...Printed on recycled paper Printed in Japan Sep 1999 1 7 1 F40B YAMAHA MOTOR CO LTD ...