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3-8
ENGINE
EAS00067
MEASURING THE COMPRESSION
PRESSURE
NOTE:
Insufficient compression pressure will result in
a loss of performance.
1. Measure:
• Valve clearance
Out of specification
→
Adjust.
Refer to “ADJUSTING THE VALVE CLEAR-
ANCE” on page 3-3.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Disconnect:
• Spark plug cap
4. Remove:
• Spark plug
CAUTION:
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from
falling into the cylinder.
5. Install:
• Compression gauge “1”
• Adaptor (compression gauge) “2”
Compression gauge
90890-03081
Adaptor (compression gauge)
90890-04082
6. Measure:
• Compression pressure
Out of specification
→
Refer to steps (c) and
(d).
2
1
Compression pressure
(at sea level)
Minimum
600 kPa (6.0 kg/cm
2
, 85.3 psi)
Standard
650 kPa (6.5 kg/cm
2
, 92.4 psi)
Maximum
700 kPa (7.0 kg/cm
2
, 99.6 psi)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Set the main switch to “ON” and the engine
stop switch to “
I
”.
b. With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilizes.
WARNING
To prevent sparking, ground the spark plug
lead before cranking the engine.
c. If the compression pressure is above the
maximum specification, check the cylinder
head, valve surfaces, and piston crown for
carbon deposits.
Carbon deposits
→
Eliminate.
d. If the compression pressure is below the
minimum specification, pour a teaspoonful of
engine oil into the spark plug bore and
measure it again.
Refer to the following table.
Compression pressure (with oil applied into
the cylinder)
Reading Diagnosis
Higher than without
Piston ring(s) worn
oil
or damaged
→
Repair.
Piston, valves,
Same as without oil
cylinder head gasket
or piston possibly
defective
→
Repair.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
7. Install:
• Spark plug
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
8. Connect:
• Spark plug cap
Содержание MT-03
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Страница 51: ...2 26 COOLING SYSTEM DIAGRAMS EAS00033 COOLING SYSTEM DIAGRAMS 5VK 5VK00 A 4 A B 4 3 2 1 2 3 1 A A A ...
Страница 53: ...2 28 COOLING SYSTEM DIAGRAMS 1 2 3 4 5 6 7 8 9 5 10 11 A B C ...
Страница 56: ...2 31 LUBRICATION CHART Pressure feed Splashed scavenge ...
Страница 57: ...2 32 LUBRICATION DIAGRAMS LUBRICATION DIAGRAMS A A 1 3 2 2 4 A A A A ...
Страница 58: ...2 33 LUBRICATION DIAGRAMS 1 Oil delivery hose 2 2 Oil strainer 3 Oil delivery hose 1 4 Oil tank ...
Страница 59: ...2 34 LUBRICATION DIAGRAMS A A A A 3 1 2 3 4 ...
Страница 60: ...2 35 LUBRICATION DIAGRAMS 1 Oil delivery pipe 2 2 Oil delivery pipe 1 3 Oil filter 4 Oil pump ...
Страница 61: ...2 36 LUBRICATION DIAGRAMS 1 7 2 3 4 5 6 A ...
Страница 63: ...2 38 LUBRICATION DIAGRAMS 1 6 5 4 3 2 ...
Страница 64: ...2 39 LUBRICATION DIAGRAMS 1 Camshaft 2 Oil delivery pipe 1 3 Oil filter 4 Main axle 5 Drive axle 6 Crankshaft ...
Страница 65: ...2 40 CABLE ROUTING CABLE ROUTING ...
Страница 67: ...2 42 CABLE ROUTING ...
Страница 69: ...2 44 CABLE ROUTING ...
Страница 71: ...2 46 CABLE ROUTING ...
Страница 73: ...2 48 CABLE ROUTING ...
Страница 75: ...2 50 CABLE ROUTING ...
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Страница 177: ...4 54 FRONT FORK WARNING Make sure the brake hoses are routed prop erly ...
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Страница 339: ...8 12 CHARGING SYSTEM 2 A C magneto 5 Rectifier regulator 7 Battery 8 Main fuse ...
Страница 341: ...8 14 CHARGING SYSTEM ...
Страница 355: ...8 28 COOLING SYSTEM ...
Страница 365: ...8 38 IMMOBILIZER SYSTEM ...
Страница 366: ...8 39 ELECTRICAL COMPONENTS EAS27970 ELECTRICAL COMPONENTS ...
Страница 368: ...8 41 ELECTRICAL COMPONENTS ...
Страница 370: ...8 43 ELECTRICAL COMPONENTS EAS27980 CHECKING THE SWITCHES ...
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Страница 397: ...COLOR CODE ...
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Страница 399: ...YAMAHA MOTOR ITALIA S P A ...
Страница 400: ...MT 03 2006 WIRING DIAGRAM ...