4
HONDA
0
CB400T
1
9.
TROUBLESHOOTI
MG
ENGINE DOES NOT START OR IS HARD TO START
Possible Cause:
1.
Loosen drain screw and check NO FUEL AT
-
(11 Fuel tank empty
for fuel at the carburetor. CARBURETOR
(2) Clogged fuel tube or fuel filter
(31 Clogged fuel inlet
FUEL REACHING CARBURETOR
(4) Clogged fuel tank cap breather hole
I
t
2. Remove spark plugs and try
spark test.
GOOD SPARK
I
1
3. Test cylinder compression
COMPRESSION NORMAL
I
4.
Try to start following normal
procedure.
ENGINE DOES NOT
FIRE
I
5. Remove and inspect spark
plug.
DRY PLUG
I
I
6. Restart with choke applied.
WEAK OR NO SPARK
*
(1
1
Faulty spark plug
(2) Fouled spark plug
(31 Faulty C.D.I. Unit
(4) Broken or shorted high tension cord
(51 Faulty A.C. generator
(6) Broken or shorted ignition coil
.
.
(71 Faulty main switch
COMPRESSION LOW
-
(1) Kick pedal slipping
(2)
Inadequate valve clearance
(31 Valve stuck open
(4) Worn cylinder and piston rings
(51 Damaged cylinder head gasket
(6)
Valve timing incorrect
ENGINE FIRES BUT
(1) Misuse of choke
STOPS
(21 Carburetor pilot screw setting
incorrect
(31 Air leaking past manifold
(4) Ignition timing incorrect (C.D.I. unit
or A.C. generator at fault)
WET PLUG
*
(1) Carburetor flooded
(21 Carburetor choke closed
(31 Throttle valve opened
Date of Issue: September, 1977
O
HONDA MOTOR CO.. LTD.
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