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HONDA
CX500
TROUBLESHOOTING
POOR PERFORMANCE AT LOW AND IDLE SPEED
SYMPTOM
CHECK
POSSIBLE CAUSE
[ C h e c k i g n i t i i n Y i m i Z n d -
1
+--
-
--
-----
-1
valve clearance
I
.-------------
1
(1) lmproper valve
1
clearance
Incorrect
(2) lmproper ignition timing
(Faulty C.D.I. unit or
r-----------
7
A.C. generator)
----------
Check carburetor pilot
I
'
screw adjustment
I
I-
-
-
---------I
( I ) Fuel air mixture too lean
Incorrect
(To correct, screwout)
(2) Fuel air mixture too rich
r------------
l
(To correct, screw in)
-
,----------
4
Check if air is leaking
I
I
past manifold
I
,------------A
(1) Deteriorated insulator
O.ring
(2) Loose carburetor
r------------
1
*
- -
- - - - - -
- -
-
i
Try spark test
I
- ( I )
Excessive carbon build.up
in combustion chamber
-(2)
Use of improper quality of
fuel
4 3 1 Clutch slipping
4 4 ) Fuel air mixture too lean
4 5 ) Insufficient coolant in radiator
(6)
Faulty thermostat
4 7 )
Clogged radiator fins
-(a)
Clogged or restricted water
-
jackets
-
I
Engine is not overheated
-
-
-
- - - - -
- - - -
,
~ ~ & ~ r ~ e - o ~ ~ n a ~ h i g ~ -
1
L.
L
------------
A
(1) Faulty, carbon or
Weak or intermittent
wet fouled spark plug
soark
(21 Faultv C.D.I. unit
-
I
Liai
A.C. denerator faulty
I speed
1
L -
-
- ---- - - - --
-1
1
(4)
lgnitibn coil out of order
(5) Broken or shorted high
tension coil wire
(6)
Faulty main switch
Engine does not knock
Date of Issue: January, 1978
OHONOA MOTOR CO., LTD.
20-3
Engine knocks
I
(1) Worn piston and cylinder
-
4 2 ) Fuel air mixture too lean
4 3 )
Use of improper grade of
fuel
-(4)
Excessive carbon build-up
in combustion chamber
-(5) Ignition timing too advanced
(Faulty C.D.I. unit or A.C.
a
generator)
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Troubleshooting
