Poor Performance At Low And Idle Speed; Poor Performance At High Speed - Eton VECTOR ST 250 Service Manual

18.2 POOR PERFORMANCE AT LOW AND IDLE SPEEDS
CHECK IGNITION TIMING
O.K.
CHECK carburetor
AIR SCREW ADJUSTMENT
O.K
CHECK FOR LEAKING
INTAKE PIPE
O.K.
PERFORM SPARK TEST

18.3 POOR PERFORMANCE AT HIGH SPEED

CHECK IGNITION TIMING
O.K.
CHECK FUEL TUBE AT
CARBURETOR
FUEL FLOWS FREELY
REMOVE CARBURETOR
CHECK FOR CLOGGED JETS
NOT CLOGGED
CHECK AIR CLEANER
FILTER ELEMENT
N.G.
N.G.
N.G
WEEK OR INTERMITTENT SPARK
N.G.
FUEL FLOW RESTRICTED
CLOGGED
DIRTY
¡ ¹ Faulty CDI unit or pulse generator
¡ ¹ Improperly adjusted air screw
¡ ¹ Deteriorated insulator o-ring
¡ ¹ Loose carburetor
¡ ¹ Loose or disconnected ignition system wires
¡ ¹ Faulty ,carbon or wet fouled spark plug
¡ ¹ Faulty alternator
¡ ¹ Faulty CDI unit
¡ ¹ Faulty ignition switch
¡ ¹ Faulty ignition coil
¡ ¹ Faulty pulse generator
¡ ¹ Broken or shorted spark plug wire
¡ ¹ Faulty engine stop switch
Faulty CDI unit
¡ ¹
¡ ¹ Faulty pulse generator
¡ ¹ Lack of fuel in tank
¡ ¹ Clogged fuel line
¡ ¹ Clogged fuel valve
¡ ¹ Logged fuel tank breather hole
¡ ¹ Clean with high pressure air gun
Clean the filter
¡ ¹
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Possibility
Possibility