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WARNING
POTENTIAL HAZARD
Improper cleaning of the spark arrester.
Hot exhaust system
WHAT CAN HAPPEN
Could injure the eyes.
Could cause burns.
Could cause carbon monoxide poison-
ing, possibly leading to death.
Could start a fire.
HOW TO AVOID THE HAZARD
When cleaning the spark arrester:
Always let the exhaust system cool pri-
or to touching exhaust components.
Do not start the engine when cleaning
the exhaust system.
EBU00296
Carburetor adjustment
The carburetor is a vital part of the engine and
requires very sophisticated adjustment. Most
adjusting should be left to a Yamaha dealer
who has the professional knowledge and ex-
perience to do so. However, the idling speed
may be performed by the owner as a part of
the usual maintenance routine.
CAUTION:
The carburetor was set at the Yamaha fac-
tory after many tests. If the settings are
disturbed by someone without sufficient
technical knowledge, poor engine perfor-
mance and damage may result.
8-34
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Table of Contents
Troubleshooting
Need help?
Do you have a question about the KODIAK 400 Ultramatic 4x4 and is the answer not in the manual?
Questions and answers
Have crank no spark on atv.
A Yamaha Kodiak 400 Ultramatic 4x4 ATV may have no spark when cranking due to the following possible causes:
1. Faulty Spark Plug – The spark plug may be worn, heavily carbonized, or have an incorrect electrode gap. Inspect and replace if necessary.
2. Loose or Disconnected Spark Plug Cap – Ensure the spark plug cap is properly connected.
3. Ignition System Issues – A faulty ignition coil, CDI unit, or stator could prevent spark generation.
4. Wiring Problems – Damaged or disconnected wires in the ignition system may interrupt the spark.
5. Kill Switch or Key Switch Malfunction – A defective switch may prevent ignition.
6. Weak or Dead Battery – If the battery is weak, it may not provide sufficient power to the ignition system.
7. Engine Grounding Issues – Poor grounding may disrupt the electrical flow needed for spark.
Checking and addressing these potential issues may help restore spark to the ATV.
This answer is automatically generated
Cylinder head kit numbers