Poor Performance At Low And Idle Speeds; Poor Performance At Hogh Speed; Poor Handling - Honda V30 Magna VF500C Manual

~HONDA
~V30MAGNA
TROUBLESHOOTING
POOR PERFORMANCE AT LOW AND IDLE SPEEDS
1. Check ignition timing and valve clearance
CORRECT
t
2. Check carburetor pilot screw adjustment
CORRECT
t
3. Check for leaking intake pipe
NO LEAK
t
4. Perform spark test
GOOD SPARK
POSSIBLE CAUSE
I N C O R R E C T - - - - - - - - - - - - - - - - l ..... (1 ) Improper valve clearance
(2) Improper ignition timing
(Faulty spark unit)
INCORRECT - - - - - - - - - - - - - - ..
~See
Fuel System Section
L E A K I N G - - - - - - - - - - - - - - -...
~(l)
Deteriorated insulator O-ring
(2) Loose carburetor
WEAK OR INTERMITTENT SPARK-----.....
~(1)
Faulty, carbon or wet fouled
spark plug
(2) Faulty spark unit
(3) Faulty ignition coil
POOR PERFORMANCE AT HIGH SPEED
NOTE: ignition to the No.2 and No.4 cylinders is cut-off at 12,000 rpm to prevent engine damage.
1. Check ignition timing and valve clearance
CORRECT
t
2. Disconnect fuel line at carburetor
FUEL FLOWS FREELY
!
3. Remove carburetors and check for
clogged jets
NO CLOGGED JETS
t
4. Check valve timing
CORRECT
t
5. Check valve spring tension
NOT WEAKENED
I N C O R R E C T - - - - - - - - - - - - - - - - l ..... (l) Improper valve clearance
(2) Faulty spark unit
(3) Faulty pulse generator
FUEL FLOW RESTRICTED--------- ..
(1)
Fuel tank empty
(2) Clogged fuel line
(3) Clogged fuel tank breather hole
(4) Clogged fuel valve
(5) Faulty fuel pump
CLOGGED---------------IIIO'~Clean
INCORRECT--------------IO'_Cam sprocket not installed
properly
W E A K - - - - - - - - - - - - - - - - -......... Faulty spring
POOR HANDLING
--------1 .. __ Check tire and suspension pressures
1. If steering is heavy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ .. (1) Steering stem adjuster nut too
tight
(2) Damaged steering head bearings
2. If either wheel is wobbling
--------------------------_10'
(1) Excessive wheel bearing play
(2) Bent rim
(3) Improperly installed wheel
(4) Swing arm pivot,bearing
excessively worn
(5) Bent frame
3. If the motorcycle pulls to one side
--------------------------10-(1)
Bent frame
Date of Issue: July, 1984
© HONDA MOTOR CO., LTD.
(2) Front and rear wheels not aligned
(3) Bent front fork
(4) Bent swing arm
20-3