Engine Lacks Power - Honda CX650C 1983 Shop Manual

ENG!NE L.ACKS POWER
POSSIBLE CAUSES
1. Raise wheels off ground and spin WHEELS DO NOT SPIN FREELY (1) Brake dragging.
by hand.
(2) Worn or damaged wheel bear-
ing.
(3) Wheel bearing needs lubrica-
tion.
(4) Final gear bearing damged.
PRESSURE LOW
p -
(I ] Punctured tire.
PRESSURE NORMAL (2) Falutly tire valve.
4
3. Accelerate rapidly from low t o ENGINE SPEED CHANGES
~ r -
( l ) Clutch slipping.
second. WHEN CLUTCH IS RELEASED
(2)
Worn clutch disclpiate.
(3) Warped clutch discfplate.
ENGINE SPEED LOWERED WHEN
CLUTCH IS RELEASED
t
4. Accelerate lightly. ENGINE SPEED DOES MOT INCREASE (1) Carbutetor choke closed.
(2) Clogged air cleaner.
SPEED INCREASES
(3)
Restricted fuel flow.
(4) Clogged fuel tank breather
tube.
(5) Clogged muffler.
5.
Check ignition timing. INCORRECT
~ ( 1 )
Faulty spark unit.
(2)
Faulty pulse generator.
CORRECT (3) Faulty ignition advancer.
I
+
6. Check valve clearance. INCORRECT
-
b ( 1 )
Improper valve adjustment.
(2) Worn valve seat.
CORRECT
4
7.
Test cylinder compression. TOO LOW
bp
( l
) Valve stuck open.
(2) Worn or damaged cylinder
NORMAL and piston rings.
(3) Leaking head gasket.
(4) Improper valve timing.
8.
Check carburetor for clogging. CLOGGED
B -
(1)
Carburetor not serviced
NOT CLOGGED
i
9.
Remove spark plug. FOULED OR DISCOLORED
NOT FOULED OR DISCOLORED
I
C
10. Check oil level and condition.
I M CO R R E CT
CORRECT
frequently enough.
(1)
Plugs not serviced frequently
enough.
(2) Spark plug with incorrect heat
range.
B -
(1 ) Oil level too high.
(2)
Oil level too low.
(3)
Contaminated oil.
4
11. Remove cylinder head cover and VALVE TRAIN NOT LUBR ICATED (1 ) Clogged oil passage.
inspect lubrication. PROPERLY (2) Clogged oil control orifice.
VALVE TRAIN LUBRICATED
PROPERLY
C
Date of Issue: Decern ber, 1982
O
HONDA MOTOR
CO.,
LTD.