Honda CX500 1978 Shop Manual page 249

HONDA
CX500
TROUBLESHOOTING
ENGINE NOISE
ENGINE OVERHEATS
--
0
SYMPTOM PROBABLE CAUSE
(1) Insufficient coolant in radiator
(2) Clogged radiator
(3) Clogged water jackets
(4) Damaged water pump impeller
(5) Presence of air in cooling system
(6) Faulty radiator cap
(7) Loose cooling fan
If valves are noisy
Date of Issue: January, 1978
oHoNDA MOTOR CO., LTD.
20-5
(1 ) Excessive valve clearance
(2) Worn valve adjusting screw
(3) Worn rocker armslcamshaft
(4) Bent push rods
-
(1) Worn piston and cylinder
-
(2) Worn piston pin and rod small end
(3) Excessive carbon build-up in combustion chamber
If cam chain is noisy
(1) Improper cam chain tension
(2) Worn cam sprocket teeth
(3) Worn camshaft bearing
(4) Worn cam chain
If clutch rattles or chatters
(1) Excessive backlash between cluth outer and clutch plate
4 2 ) Excessive backlash between clutch center
l
and clutch plate
If crankshaft is noisy
(1) Worn main journal bearing
4 2 1 Worn crankpin bearing
I f gears rattle (1
I
Worn or binding primary gear
(2) Worn splines
(3) Damaged driven gear damper rubbers