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ENGINE INSPECTION
5-1
EAS1SD1025
ENGINE INSPECTION
EAS20710
MEASURING THE COMPRESSION
PRESSURE
TIP
Insufficient compression pressure will result in a
loss of performance.
1. Remove:
• Storage box
Refer to “GENERAL CHASSIS” 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
ECA1SD1010
Before removing the spark plug, use com-
pressed air to blow away any dirt accumulat-
ed in the spark plug wells to prevent it from
falling into the cylinder.
6. Install:
• Compression gauge “1”
7. Measure:
• Compression pressure
Out of specification
→
Refer to steps (c) and
(d).
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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.
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8. Install:
• Spark plug
9. Connect:
• Spark plug cap
10.Install:
• Storage box
Refer to “GENERAL CHASSIS” on page 4-1.
Compression gauge
90890-03081
Engine compression tester
YU-33223
1
Standard compression pressure
(at sea level)
550 kPa/680 r/min (5.5
kgf/cm²/680 r/min, 78.2 psi/680
r/min)
Minimum–maximum
480–620 kPa (4.8–6.2 kgf/cm²,
68.3–88.2 psi)
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, cylin-
der head gasket or
piston ring(s) possi-
bly defective
→
Re-
pair.
T
R
.
.
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
Содержание MBK XMAX 2014
Страница 1: ...2014 SERVICE MANUAL YP125R YP125RA 2DM F8197 E0 ...
Страница 6: ......
Страница 8: ......
Страница 64: ...TIGHTENING TORQUES 2 17 Muffler tightening sequence 1 2 3 ...
Страница 72: ...LUBRICATION SYSTEM DIAGRAMS 2 25 EAS2DM1116 LUBRICATION SYSTEM DIAGRAMS 1 2 3 4 5 3 ...
Страница 73: ...LUBRICATION SYSTEM DIAGRAMS 2 26 1 Camshaft 2 Crankshaft 3 Oil pump 4 Oil filter 5 Oil strainer ...
Страница 78: ...CABLE ROUTING 2 31 Steering head front view 1 2 3 4 5 6 8 8 A 7 7 ...
Страница 80: ...CABLE ROUTING 2 33 Front brake left side view for YP125R 1 2 2 1 1 2 2 D E A B C ...
Страница 82: ...CABLE ROUTING 2 35 Front brake left side view for YP125RA 2 1 1 2 1 2 2 A B D E C ...
Страница 84: ...CABLE ROUTING 2 37 Engine and rear brake left side and right side view for YP125R B 2 1 2 1 2 A A 3 3 C ...
Страница 86: ...CABLE ROUTING 2 39 Engine and rear brake left side and right side view for YP125RA 1 2 1 2 2 A A B 3 4 3 4 4 ...
Страница 92: ...CABLE ROUTING 2 45 Frame right side view 3 2 4 1 2 3 A B 6 5 3 A B 3 3 2 3 3 A A B A B B 3 ...
Страница 94: ...CABLE ROUTING 2 47 Engine right side view 6 6 6 6 C D C D D C 10 B 9 5 6 1 2 8 3 4 5 6 7 A ...
Страница 98: ...CABLE ROUTING 2 51 Frame left side view C D C D 2 1 E 1 2 D C 6 1 4 5 3 2 1 7 3 2 1 A B ...
Страница 100: ...CABLE ROUTING 2 53 Engine left side view 1 1 1 1 1 2 3 4 5 6 7 8 9 7 7 A B A B A B 1 ...
Страница 102: ...CABLE ROUTING 2 55 Frame top view 7 8 9 10 11 12 13 13 17 19 19 A D B C 14 C B 1 2 3 4 5 6 14 15 16 18 19 ...
Страница 104: ...CABLE ROUTING 2 57 Engine and frame top view 1 2 4 5 6 7 8 9 10 11 12 13 1 4 5 6 7 8 1 3 10 11 6 8 C 3 11 B A B A 3 ...
Страница 106: ...CABLE ROUTING 2 59 Rear brake right side view 2 2 2 2 2 2 1 1 2 3 A B C 3 ...
Страница 108: ...CABLE ROUTING 2 61 Hydraulic unit for YP125RA 3 2 1 2 3 3 2 2 3 2 2 2 3 3 3 4 4 1 1 4 2 6 B A A 5 1 5 1 5 ...
Страница 110: ...CABLE ROUTING 2 63 ...
Страница 228: ...REAR SHOCK ABSORBER ASSEMBLIES AND SWINGARM 4 89 ...
Страница 231: ......
Страница 291: ...CRANKSHAFT 5 60 a 1 ...
Страница 292: ...CRANKSHAFT 5 61 ...
Страница 302: ...WATER PUMP 6 9 ...
Страница 313: ......
Страница 329: ...CHARGING SYSTEM 8 16 2 AC magneto 3 Rectifier regulator 12 Battery 13 Main fuse 17 Frame ground ...
Страница 331: ...CHARGING SYSTEM 8 18 ...
Страница 349: ...COOLING SYSTEM 8 36 ...
Страница 391: ...FUEL PUMP SYSTEM 8 78 ...
Страница 400: ...IMMOBILIZER SYSTEM 8 87 a Light on b Light off ...
Страница 401: ...IMMOBILIZER SYSTEM 8 88 ...
Страница 405: ...ABS ANTI LOCK BRAKE SYSTEM for YP125RA 8 92 ...
Страница 439: ...ABS ANTI LOCK BRAKE SYSTEM for YP125RA 8 126 ...
Страница 464: ...ELECTRICAL COMPONENTS 8 151 ...
Страница 476: ......
Страница 477: ......
Страница 478: ......