Poor Performance At Low And Idle Speed - Honda VTR1000F Service Manual

TROUBLESHOOTING
From page 21-2
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Possible cause
10. Remove cylinder head cover and - - Valve train not lubricated
-----I,.. ...
Clogged oil passage
inspect lubrication properly • Clogged oil orifice
I
Valve train lubricated properly
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Check for engine overheating - - - - - Overheating
----------tl,...~.
Coolant level too low
I
•
Fan motor not working (Faulty fan mo-
tor or fan motor switch)
Not overheating • Thermostat stuck closed
• Excessive carbon build-up in combus-
tion chamber
• Use of poor quality fuel
• Clutch slipping
• Lean fuel mixture
• Wrong type of fuel
11. Accelerate or run at high speed - - - Engine knocks
---------1 ....
Worn piston and cylinder
I •
Wrong type of fuel
t •
Excessive carbon build-up in combus-
Engine does not knock tion chamber
• Ignition timing too advance (Fautly
ICM)
• Lean fuel mixture
POOR PERFORMANCE AT LOW AND IDLE SPEED
1. Check carburetor pilot screw - - - - -
adjustment
I
Correct
!
Possible cause
Incorrect - - - - - - - - -... ,..~ • See section 5
2. Check for leaking carburetor insulator - Leaking - - - - - - - - - - , . . ... Loose carburetor insulator bands
I •
Damaged carburetor insulator
No leak
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3. Perform spark test - - - - - - - - - Weak or intermittent spark - -......
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Faulty spark plug
I
•
Fouled spark plug
• Loose or disconnected ignition system
&~~~ ~~
4. Check ignition timing - - - - - - - - Incorrect
• Broken or shorted spark plug wire
• Faulty ignition pulse generator
• Faulty ignition coil
• Faulty engine stop switch
• Faulty ignition control module (lCM)
• Faulty converter unit
• Faulty ignition switch
----------1,.. ...
Faulty ignition control module (ICM)
• Faulty ignition pulse generator
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