Poor Performance At Low And Idle Speed - Honda CR 125R 2002 Sevice Manual

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TROUBLESHOOTING
9. Check for engine overheating - -.. Overheating
--------~
••• Excessive carbon built-up in combus-
+
tion chamber
Not Overheating Use of poor quality fuel
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Clutch slipping
lean fuel mixture
Wrong type of fuel
10. Accelerate or run at high speed - Engi ne Knocks
-------~ ..
Worn piston and cylinder
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-~_~-
Engine Does Not Knock Excessive carbon built-u p in combus-
tion chamber
• Ignition timing too advanced {faulty
Ignition Control Module
(leM))
• Lean fuel mixture
POOR PERFORMANCE AT LOW AND IDLE SPEED
POSSIBLE CAUSE
1. Check ignition timing -----~ •• Incorrect ---------~ •• • Improper ignition timing
(faulty Ignition Control Module (teM ))
Correct
!
Faulty alternator
2. Check carburetor air screw - - -_ . Incorrect - - - - - - - - -- . See page section 4
adjustment
Correct
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3. Check for leaking intake pipe --~ .. leaking - - - - - - - - - -•• - loose insulator clamp
No leak gasket
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-
Damaged insulator and reed valve
4. Perform spark test ------~ •• Weak or Intermittent Spark ---~.. Carbon or wet fouled spark plug
Good Spark
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Faulty Ignition Control Module (ICM)
Faulty ignition coil
Broken or shorted spark plug wire
Faluty engine stop switch
Faluty ignitio n pulse generator
Faulty alternator
5. Check RC valve system - - - - -.. Incorrect
---------~..
Faulty exhaust valve
Correct
Excessive carbon build-up on the
flap valve or valve shaft
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