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1.5 Fault diagnostic procedure for excessive fuel consumption
Support the main frame
and rotate wheels
Inflexible rotation
①Check the brake for any drag
②Check the wheel bearing for any
wear
③Check if the hub spacer bush is
absent or too short
Exclude as the case may be
yes
I t e m
applies
68
yes
T h e c o m b u s t i b l e
mixture ratio is proper
Check if the engine
speed is too high
No
Check if ignition timing
1 . 1
is proper or not
Check the
ignition system
Excessive fuel consumption
Check if the operation
method is proper
①Check if the motorcycle is overloaded or
does not run at economic speed or runs at
low speed
② Check if the used gasoline is correct
Flexible rotation
Check the tire pressure
Too low pressure
Inflate sufficient gas
as required
yes
T h e c o m b u s t i b l e
mixture is too dense
① Check if the air cleaner is clogged.
② Check if the oxygen sensor is
working well
③ Check if the fuel nozzle is working
correctly
No
Normal pressure
Check if the fuel tank, fuel pipe
and so on for any leakage and if
the tube hoop is locked
No
Check the combustible mixture ratio
T h e c o m b u s t i b l e
mixture is too diluted
①C h e c k i f t h e f u e l
filter
is clogged.
② Check if the fuel
nozzle is blocked
③ Check if the oxygen
sensor is working well
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