CHAPTER 3 ENGINE
ATV SERVICE MANUAL 2005/
version number 0501
CHAPTER 3 ENGINE PAGE. 3- 11
3.2.4COMPRESSION PRESSURE
MEASUREMENT
NOTE :
Insufficient compression pressure will result in
performance loss.
1. Check:
Valve clearance
Out of specification Adjust.
Refer to
“CALCE CLEARANCE ADJUSTMENT”
section.
2. Start the engine and let it warm up for several
minutes.
3. Turn off the engine.
4. Remove:
Spark plug
Before removing the spark plug, use com
pressed air to blow away any dirt accumulated
in the spark plug well to prevent it from falling
into the cylinder.
5. Attach:
Compression gauge
6. Measure:
Compression pressure
If it exceeds the maximum pressure allowed
→
Inspect the cylinder head, valve surfaces and
piston crown for carbon deposits.
If it is below the minimum pressure
→
Squirt a few drops of oil into the affected cylinder
and measure again. Follow the table below.
Compression pressure
(With oil applied into cylinder)
Reading
Diagnosis
Higher than
without oil
Worn or damaged pistons
Same as
without oil
Possible defective ring (s),
valves,
cylinder head gasket or
Piston
→Repair.
Compression pressure(at sea level):
Summary of Contents for LH400CUV-2
Page 1: ...LH400CUV 2 SERVICE MANUAL ...
Page 11: ...CHAPTER 1 GENERALINFORMATION CUV SERVICE MANUAL 09 0 CHAPTER 1 GENERAL PAGE 1 7 NOTES 12 ...
Page 17: ...CHAPTER 2 MAINTENANCE CUV SERVICE MANUA 09 0 CHAPTER 2 MAINTENANCE PAGE 2 6 ...
Page 26: ...CHAPTER 2 MAINTENANCE CUV SERVICE MANUA 09 0 CHAPTER 2 MAINTENANCE PAGE 2 15 NOTES ...
Page 94: ...CHAPTER 3 ENGINE ATV SERVICE MANUAL 2005 version number 0501 CHAPTER 3 ENGINE PAGE 3 68 NOTES ...
Page 95: ...CHAPTER 3 ENGINE ATV SERVICE MANUAL 2005 version number 0501 CHAPTER 3 ENGINE PAGE 3 69 ...
Page 107: ...CHAPTER 4 CHASSIS CUV SERVICE MANUAL 09 0 CHAPTER 4 CHASSIS PAGE 4 12 NOTES ...
Page 135: ...CHAPTER 5 FINAL DRIVE CUV SERVICE MANUAL 09 0 CHAPTER 5 FINAL DRIVE 5 28 NOTES ...
Page 150: ...CHAPTER 6 TRANSMISSION CUV SERVICE MANUAL 07 0 CHAPTER 6 TRANSMISSION PAGE 6 15 NOTES ...
Page 165: ...CHAPTER 7 BRAKES CUV SERVICE MANUAL 09 0 CHAPTER 7 BRAKES PAGE 7 15 NOTES ...
Page 172: ...CHAPTER 8 ELECTRICAL CUV SERVICE MANUAL 09 0 CHAPTER 8 ELECTRICAL PAGE 8 7 CIRCUIT DIAGRAM ...
Page 205: ...CHAPTER 8 ELECTRICAL CUV SERVICE MANUAL 09 0 CHAPTER 8 ELECTRICAL CTRICAL PAGE 8 40 Fig 4 ...
Page 207: ...CHAPTER 8 ELECTRICAL CUV SERVICE MANUAL 09 0 CHAPTER 8 ELECTRICAL CTRICAL PAGE 8 42 ...
Page 208: ...CHAPTER 8 ELECTRICAL CUV SERVICE MANUAL 09 0 CHAPTER 8 ELECTRICAL CTRICAL PAGE 8 43 NOTES ...