
ENGINE INSPECTION
5-1
EAS20041
ENGINE INSPECTION
EAS30249
MEASURING THE COMPRESSION
PRESSURE
TIP
Insufficient compression pressure will result in a
loss of performance.
1. Remove:
• Center cover
Refer to “GENERAL CHASSIS (1)” on page
4-1.
2. Measure:
• Valve clearance
Out of specification
→
Adjust.
Refer to “ADJUSTING THE VALVE CLEAR-
ANCE” on page 3-4.
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Disconnect:
• Spark plug cap
5. Remove:
• Spark plug
NOTICE
ECA20470
Before removing the spark plug, use com-
pressed air to blow away any dirt accumulat-
ed in the spark plug well to prevent it from
falling into the cylinder.
6. Install:
• Compression gauge “1”
• Compression gauge extensions S “2”
7. Measure:
• Compression pressure
Out of specification
→
Refer to steps (c) and
(d).
▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼▼▼
a. Turn the main switch to “ON”.
b. With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilizes.
WARNING
EWA12940
To prevent sparking, ground all spark plug
leads 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 min-
imum specification, pour a teaspoonful of en-
gine oil into the spark plug bore and measure
again.
Refer to the following table.
▲▲▲
▲
▲ ▲▲▲
▲
▲ ▲▲▲
▲
▲ ▲▲▲
▲
▲ ▲▲▲
▲
▲ ▲▲▲
▲
▲▲▲
8. Install:
• Spark plug
9. Connect:
• Spark plug cap
Compression gauge
90890-03081
Engine compression tester
YU-33223
Compression gauge extension S
90890-03195
1
2
Standard compression pressure
(at sea level)
1600 kPa/725 r/min (16.0
kgf/cm²/725 r/min, 227.6 psi/725
r/min)
Minimum–maximum
1392–1792 kPa/725 r/min (13.9–
17.9 kgf/cm²/725 r/min, 198.0–
254.9 psi/725 r/min)
Compression pressure (with oil applied into the
cylinder)
Reading
Diagnosis
Higher than without oil
Piston ring(s) wear or
damage
→
Repair.
Same as without oil
Piston, valves, cylinder
head gasket or piston
ring(s) possibly defec-
tive
→
Repair.
T
R
.
.
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
Содержание MBK MW125 2014
Страница 1: ...SERVICE MANUAL MW125 2014 MW125F 2015 2CM F8197 E0...
Страница 6: ......
Страница 8: ......
Страница 49: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 20...
Страница 52: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23 EAS30021 LUBRICATION DIAGRAMS 1 3 2...
Страница 53: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 24 1 Oil strainer 2 Oil pump assembly 3 Camshaft...
Страница 54: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 2 3 4 5 1...
Страница 56: ...COOLING SYSTEM DIAGRAMS 2 27 EAS20020 COOLING SYSTEM DIAGRAMS 1 2 4 3 5 6 9 8 3 4 5 7...
Страница 60: ...CABLE ROUTING 2 31 Steering head left side view A A A A 1 2 2 2 1 1 2 1 2 1 2 B...
Страница 62: ...CABLE ROUTING 2 33 Front wheel left side view 1 2 1 1 1...
Страница 63: ...CABLE ROUTING 2 34 1 Speed sensor lead 2 Front brake hose...
Страница 64: ...CABLE ROUTING 2 35 Throttle body and rear wheel left and right side view 2 2 1 1 A B A C D D E E F G H D E 3...
Страница 66: ...CABLE ROUTING 2 37 Front frame right side view...
Страница 70: ...CABLE ROUTING 2 41 Front frame left side view 1 2 3 4 5 6 7 8 9 10 A 4 7 5 6 11 13 12...
Страница 74: ...CABLE ROUTING 2 45 Front frame top view 1 2 3 4 2 3 4 5 6 12 10 11 13 7 8 8 9 A 2 3 5 4 6...
Страница 76: ...CABLE ROUTING 2 47 Rear frame top view 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A B...
Страница 78: ...CABLE ROUTING 2 49...
Страница 81: ......
Страница 129: ...GENERAL CHASSIS 8 4 20 a Fit the projections on the front side panel into the slots in the side cowling...
Страница 205: ...ENGINE INSPECTION 5 2 10 Install Center cover Refer to GENERAL CHASSIS 1 on page 4 1...
Страница 248: ...V BELT AUTOMATIC TRANSMISSION 5 45 a 1 2...
Страница 270: ...CRANKSHAFT 5 67...
Страница 282: ...WATER PUMP 6 11...
Страница 287: ...FUEL TANK 7 4 Refer to INSTALLING THE FUEL TANK on page 7 2...
Страница 296: ...THROTTLE BODY 7 13...
Страница 298: ...IGNITION SYSTEM 8 1 EAS20072 IGNITION SYSTEM EAS30490 CIRCUIT DIAGRAM...
Страница 302: ...ELECTRIC STARTING SYSTEM 8 5 EAS20073 ELECTRIC STARTING SYSTEM EAS30493 CIRCUIT DIAGRAM...
Страница 307: ...ELECTRIC STARTING SYSTEM 8 10...
Страница 308: ...CHARGING SYSTEM 8 11 EAS20074 CHARGING SYSTEM EAS30496 CIRCUIT DIAGRAM...
Страница 311: ...CHARGING SYSTEM 8 14...
Страница 312: ...LIGHTING SYSTEM 8 15 EAS20075 LIGHTING SYSTEM EAS30498 CIRCUIT DIAGRAM...
Страница 316: ...SIGNALING SYSTEM 8 19 EAS20076 SIGNALING SYSTEM EAS30500 CIRCUIT DIAGRAM...
Страница 322: ...FUEL INJECTION SYSTEM 8 25 EAS20078 FUEL INJECTION SYSTEM EAS30504 CIRCUIT DIAGRAM...
Страница 349: ...FUEL INJECTION SYSTEM 8 52...
Страница 350: ...ELECTRICAL COMPONENTS 8 53 EAS20089 ELECTRICAL COMPONENTS 1 2 3 4 5 6 9 11 12 10 8 7 13 17 18 19 23 22 21 20 14 15 16...
Страница 366: ...ELECTRICAL COMPONENTS 8 69...
Страница 375: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 8...
Страница 377: ......
Страница 378: ......