Honda CX500 1978 Shop Manual page 246

TROUBLESHOOTING
a
ENGINE LACKS POWER
SYMPTOM
0
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CHECK PROBABLE CAUSE
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+(I) Punctured tire
Tire pressure normal
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-- (2) Faulty tire valve
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Raise wheels off ground
1 I
and spin
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- ( I ) Brake dragging
L
A
Wheel spins freely
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Check tire pressure
*
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,
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with tire gauge
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Clutch slipping
Worn clutch disc
Warped clutch disc
Weak clutch spring
-
(2) Worn or damaged wheel
bearing
4 3 1 Wheel bearing needs
lubrication
*
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'
Try rapid acceleration from
i
3 low t o second I
'
Engine SpePddoPlnoc
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r ( l )
I
Engine speed not in-
Engine speed increased
- ( I ) Carburetor choke closed
creased sufficiently
-(2) Clogged air cleaner
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,
-(3) Restricted fuel flow
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4
Check ignition timing
1 -(4) Clogged fuel tank breather
I c a ~ hole
2
L
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J
-14) Final gear bearing damaged
clutch is released
lmproper ignition
Ignition timing is correct
(1) Faulty C.D.I. unit
timing
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7
[(2) Faulty A.C. generator
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Check valve clearance
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2
(1) lmproper valve adjust-
6
I
ment
(2)
Worn valve seat
Valve clearance is normal
not correct
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uslng compression gauge
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4 1 ) Valvestuckopen
-(2) Worn cylinder andlor
Compression is low piston rings
I
-(3)
Leaking head gasket
1 -
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- -
4 4 ) lmproper valve timing
Jchi ~ k,b,%&G,i g i - ,
I .
~ n g I
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- 2
Carburetor i s not clogged Carburetor is clogged
1
( I ) Carburetor not serviced
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4-
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1
frequently enough
7 Remove spark plugs
I
I
L
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A
Plug i s not fouled or dis-
( I ) Plugs not serviced
colored frequently enough
(2) Use of plug with improper
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J
7
heat range
Remove oil level gauge and
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I
check oil level and fouling
I
1
L
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(1) Oil level too high
Oil level is not correct
r(2) Oil level too low
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-
-
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L ( 3 ) Contaminated oil
$~zo;eTylinder head cover I
I
and inspect lubrication
I
Valve train is lubricated L - - - - - - - - - - - - - J (1) Clogged oil passage
N ( 2 ) Clogqed oil control orifice
I
I Lightly accelerate engine
1
(4)
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change when clutch
is released
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1
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Check if engine overheats I
L
1
(21
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13)
Dateof Issue: January, 1978
OHONDA MOTOR CO., LTD.