Troubleshooting
Tips
149
Troubleshooting
The items that are serviceable using this Manual
are followed by the page number reference in
parenthesis. The items that require use of an
official Honda Shop Manual are followed by an
asterisk (*).
ENGINE DOES NOT START OR IS HARD TO START
CHECK
POSSIBLE CAUSES
1. Check the spark
plug condition
(P.71)
• Incorrect spark plug heat
range
• Incorrect spark plug gap
• Dirty air cleaner element
2. Try spark test*
• Faulty spark plug (P.71)
• Fouled spark plug (P.71)
• Faulty ECM*
• Broken or shorted spark
plug wire
• Faulty alternator*
• Faulty ignition coil*
• Faulty engine stop
button*
• Loose or disconnected
ignition system wires
• Faulty CKP sensor*
• Faulty regulator/rectifier*
• Faulty condenser*
3. Check the PGM-FI
system (P.11)
• Faulty PGM-FI system
(P.13)
4. Check the fuel
pump operation
and inspect the fuel
flow*
• Faulty fuel pump*
• Clogged fuel pump filter
(P.48)
5. Test cylinder
compression*
• Valve clearance too small
• Valve stuck open
• Worn cylinder and piston
ring*
• Damaged cylinder head
gasket
• Improper valve timing*
• Seized valve
6. Start by following
normal starting
procedure
• Insulator leaking
• Improper ignition timing
(Faulty ECM or CKP
sensor)*
• Fast idle knob stuck open
or damaged
• Fuel contaminated
CORRECT
INCORRECT
GOOD SPARK
WEAK OR
NO SPARK
CORRECT
INCORRECT
CORRECT
INCORRECT
CORRECT
LOW
ENGINE
STARTS BUT
SOON STOPS
ENGINE LACKS POWER
CHECK
POSSIBLE CAUSES
1. Check the wheel
spins smoothly
• Brake dragging
• Worn or damaged wheel
bearings
• Bent axle shaft
• Drive chain too tight
2. Check the tyre
pressure (P.100)
• Faulty valve core
• Punctured tyre
3. Check the engine
speed changes
accordingly when
the clutch is
engaged*
• Clutch slipping
• Improperly adjusted
clutch lever freeplay
(P.66)
• Worn clutch discs/plates
(P.69)
• Warped clutch discs/
plates (P.69)
• Weak clutch springs
(P.69)
• Sticking clutch lifter
• Additive in engine oil
4. Check the engine
speed increase
• Dirty air cleaner element
• Clogged muffler
• Fast idle knob stuck open
or damaged
• Restricted fuel fill cap
breather tube
• Restricted fuel flow
5. Check for engine
knocking when
accelerating or
running the engine
at high speed
• Worn piston and cylinder*
• Use of poor quality fuel
• Excessive carbon build-
up in combustion
chamber
• Ignition timing too
advanced (Faulty ECM)*
• Lean fuel mixture
6. Check the ignition
timing*
• Faulty ECM*
• Faulty CKP sensor*
CORRECT
INCORRECT
CORRECT
INCORRECT
GOOD
NO GOOD
GOOD
NO GOOD
CORRECT
YES
CORRECT
INCORRECT
7. Test cylinder
compression*
• Valve clearance too small
• Valve stuck open
• Worn cylinder and piston
ring*
• Damaged cylinder head
gasket
• Improper valve timing*
• Faulty decompressor
system*
8. Check the PGM-FI
system (P.11)
• Faulty PGM-FI system
(P.13)
9. Check the fuel
pump operation
and inspect the fuel
flow*
• Faulty fuel pump unit*
• Clogged fuel pump filter
(P.48)
10.Check the spark
plug condition
(P.71)
• Incorrect spark plug
• Incorrect spark plug gap
• Dirty air cleaner element
11.Check the engine
oil level and
condition (P.54)
• Engine oil level too high
• Engine oil level too low
• Contaminated engine oil
12.Remove the
cylinder head cover
and inspect
lubrication
• Faulty oil pump*
• Faulty pressure relief
valve*
• Clogged oil passage*
• Clogged oil strainer
screen*
CORRECT
LOW
CORRECT
INCORRECT
CORRECT
INCORRECT
CORRECT
INCORRECT
CORRECT
INCORRECT
INCORRECT
CRF450R.book Page 149 Thursday, July 8, 2010 9:34 AM
Summary of Contents for CRF450R 2011
Page 1: ...CRF450R ...
Page 9: ...CRF450R book Page 8 Thursday July 8 2010 9 34 AM ...
Page 17: ...8 Motorcycle Safety CRF450R book Page 8 Thursday July 8 2010 9 34 AM ...
Page 23: ...14 Instruments Controls CRF450R book Page 14 Thursday July 8 2010 9 34 AM ...
Page 27: ...18 Before Riding CRF450R book Page 18 Thursday July 8 2010 9 34 AM ...
Page 33: ...24 Basic Operating Instructions CRF450R book Page 24 Thursday July 8 2010 9 34 AM ...
Page 172: ...Technical Information 163 CRF450R book Page 163 Thursday July 8 2010 9 34 AM ...
Page 177: ...168 Memo CRF450R book Page 168 Thursday July 8 2010 9 34 AM ...
Page 185: ...CRF450R book Page 8 Thursday July 8 2010 11 47 AM ...
Page 193: ...8 La sécurité à moto CRF450R book Page 8 Thursday July 8 2010 11 47 AM ...
Page 199: ...14 Instruments et commandes CRF450R book Page 14 Thursday July 8 2010 11 47 AM ...
Page 203: ...18 Avant de piloter CRF450R book Page 18 Thursday July 8 2010 11 47 AM ...
Page 209: ...24 Instructions d utilisation de base CRF450R book Page 24 Thursday July 8 2010 11 47 AM ...
Page 348: ...Informations techniques 163 CRF450R book Page 163 Thursday July 8 2010 11 47 AM ...
Page 353: ...168 Notes CRF450R book Page 168 Thursday July 8 2010 11 47 AM ...
Page 361: ...CRF450R book Page 8 Thursday July 8 2010 3 20 PM ...
Page 369: ...8 Motorrad Sicherheit CRF450R book Page 8 Thursday July 8 2010 3 20 PM ...
Page 375: ...14 Instrumente und Bedienungselemente CRF450R book Page 14 Thursday July 8 2010 3 20 PM ...
Page 379: ...18 Vor dem Fahren CRF450R book Page 18 Thursday July 8 2010 3 20 PM ...
Page 385: ...24 Grundlegender Betrieb CRF450R book Page 24 Thursday July 8 2010 3 20 PM ...
Page 524: ...Technische Informationen 163 CRF450R book Page 163 Thursday July 8 2010 3 20 PM ...
Page 529: ...168 Notizen CRF450R book Page 168 Thursday July 8 2010 3 20 PM ...
Page 537: ...CRF450R book Page 8 Friday July 9 2010 6 15 PM ...
Page 545: ...8 Veiligheid bij motorfietsen CRF450R book Page 8 Friday July 9 2010 6 15 PM ...
Page 551: ...14 Instrumenten en bediening CRF450R book Page 14 Friday July 9 2010 6 15 PM ...
Page 555: ...18 Voordat u gaat rijden CRF450R book Page 18 Friday July 9 2010 6 15 PM ...
Page 561: ...24 Voornaamste bedieningsinstructies CRF450R book Page 24 Friday July 9 2010 6 15 PM ...
Page 700: ...Technische informatie 163 CRF450R book Page 163 Friday July 9 2010 6 15 PM ...
Page 705: ...168 Memo CRF450R book Page 168 Friday July 9 2010 6 15 PM ...
Page 713: ...CRF450R book Page 8 Thursday July 8 2010 9 15 PM ...
Page 721: ...8 Seguridad de la motocicleta CRF450R book Page 8 Thursday July 8 2010 9 15 PM ...
Page 727: ...14 Instrumentos y controles CRF450R book Page 14 Thursday July 8 2010 9 15 PM ...
Page 731: ...18 Antes de circular CRF450R book Page 18 Thursday July 8 2010 9 15 PM ...
Page 737: ...24 Instrucciones básicas para la operación CRF450R book Page 24 Thursday July 8 2010 9 15 PM ...
Page 876: ...Información técnica 163 CRF450R book Page 163 Thursday July 8 2010 9 15 PM ...
Page 881: ...168 Notas CRF450R book Page 168 Thursday July 8 2010 9 15 PM ...
Page 889: ...CRF450R_IT book Page 8 Wednesday July 14 2010 10 47 AM ...
Page 897: ...8 Sicurezza della motocicletta CRF450R_IT book Page 8 Wednesday July 14 2010 10 47 AM ...
Page 903: ...14 Strumentazione e comandi CRF450R_IT book Page 14 Wednesday July 14 2010 10 47 AM ...
Page 907: ...18 Prima di mettersi alla guida CRF450R_IT book Page 18 Wednesday July 14 2010 10 47 AM ...
Page 913: ...24 Istruzioni operative fondamentali CRF450R_IT book Page 24 Wednesday July 14 2010 10 47 AM ...
Page 1052: ...Informazioni tecniche 163 CRF450R_IT book Page 163 Wednesday July 14 2010 10 47 AM ...
Page 1057: ...168 Promemoria CRF450R_IT book Page 168 Wednesday July 14 2010 10 47 AM ...
Page 1058: ...1500 2010 03 B Printed in China 3RMEN640 00X3R MEN 6400 BLACK PANTONE 186C ...