Carburetor - KEEWAY 500ATV Service Manual

Complaint
Difficulty or locked
gearshift

2. Carburetor

Complaint
Starting Difficulty
Idling or
low-speed
trouble
Medium or high
speed trouble
Overflow and fuel
level fluctuation
Symptom and Possible Causes
1. Broken drive or driven bevel gear teeth
2. Distorted shift fork
3. Worn shift cam
4. Improper gearshift rod
Symptom and Possible Causes
1. Clogged starter jet
2. Clogged starter jet passage
3. Air leakage from joint between starter body
and carburetor
4. Faulty starting plunger
1. Clogged slow jet
2. Clogged slow jet passage
3. Clogged air intake
4. Clogged bypass port
5. Starter plunger not fully closed
6. Improper set of idle screw
7. Improper float height
1. Clogged main jet
2. Clogged main air jet
3. Clogged needle jet
4. Faulty throttle valve
5. Clogged fuel filter
6. Improper float height
7. Starter plunger not fully closed
1. Worn or damaged needle valve
2. Damaged needle valve spring
3. Improper working float
4. Foreign matter in needle valve
14-5
14. Troubleshooting
Remedy
Replace
Replace
Replace
Adjust
Remedy
Clean
Clean
Clean, adjust or replace
gasket
Adjust
Clean
Clean
Clean
Clean
Adjust
Adjust
Adjust
Clean
Clean
Clean
Adjust
Clean
Adjust
Adjust
Replace
Replace
Adjust or Replace
Clean
14