
13 Troubleshooting
13
-
3
13
Complaint
Symptom and Possible Causes
Remedy
Poor engine
running in
high-speed
range.
1. Weak valve spring
2. Worn camshaft
3. Fouled spark plug
4. Insufficient spark plug gap
5. Improper valve timing
6. Faulty ignition coil
7. Weak high pressure oil pump,
resulting in poor fuel supply
8. Dirty air filter
Replace
Replace
Clean or replace
Adjust or replace
Replace
Adjust
Adjust or replace
Clean or replace
Exhaust smoke
is dirty or thick
1. Excessive engine oil
2. Worn piston ring
3. Worn valve guide
4. Scored or scuffed cylinder wall
5. Worn valve stem
6. Worn valve stem oil seal
Check oil level and drain
Replace
Replace
Replace
Replace
Replace
Engine lacks
power
1. Improper valve clearance
2. Weak valve spring
3. Improper valve timing
4. Worn cylinder
5. Worn piston ring
6. Improper valve seating
7. Fouled spark plug
8. Improper spark plug gap
9. Clogged carburetor jet
10. Improper fuel level in fuel
chamber
11. Dirty air filter
12. Worn rocker arm or rocker arm
shaft
13. Air leakage from air intake pipe
14. Excessive engine oil
Adjust
Adjust
Adjust
Replace
Replace
Replace or Correct
Clean or replace
Clean or replace
Clean or replace
Adjust fuel level
Clean or replace
Replace
Tighten or replace
Check oil level and drain
Engine
overheats
1. Carbon deposit on piston top
2. Insufficient or excessive engine
oil
3. Faulty oil pump
4. Clogged oil passage
5. Air leakage from air intake pipe
6. Incorrect engine oil
7. Faulty cooling system(7-5)
Clean
Check level, add or drain
Replace
Clean
Tighten or replace
Change engine oil
Summary of Contents for CF500-5B 2009
Page 1: ...WWW CFMOTO COM CF500 5B CF500 5C Service Manual CFMOTO ...
Page 2: ...All rights reserved Zhejiang CFMOTO Power Co Ltd Aug 2009 WWW CFMOTO COM ...
Page 23: ...1 19 1 Maintenance Information 1 Wir ing Pipes Cable Layout Picture 2 Picture 3 Picture 1 ...
Page 24: ...1 20 CFMOTO ...
Page 25: ...1 21 1 Maintenance Information 1 ...
Page 26: ...1 22 CFMOTO ...
Page 46: ...2 19 2 Vehicle Body and Muffler 2 V i s i b l e Parts ...
Page 79: ...4 7 4 Cool ing and Libr ication System 4 Coo l i ng System ...
Page 91: ...4 19 4 Cool ing and Libr ication System 4 ...
Page 96: ...5 4 CFMOTO Removal Bolt 4 units of Engine ...
Page 128: ...6 29 6Engine Removal Inspection and Instal lation 6 Primary and Secondary Sheave ...
Page 189: ...8 FRONT WHEEL BRAKE SUSPENSION STEERING SYSTEM 8 8 17 Steer i ng system ...
Page 212: ...11 4 CFMOTO STARTING SYSTEM TRIGGER CIRCUIT DIAGRAM STARTING DYNAMO ...
Page 236: ...11 28 CFMOTO COMPLETE SCHEMATIC CIRCUIT DIAGRAM ...