25
Y
N
Y
N
Y
N
Y
N
Diagnosis on excessive fuel consumption of engine
Excessive fuel
consumption of engine
Check whether operation is
correct
Raise the main kickstand and rotate
wheels with hands
1.
Check whether the motorcycle
runs with overload or not at
economical speed or at low gear.
2.
Check whether petrol grade is
proper.
Inflexible rotating of
wheels
Flexible rotating
of wheels
1.
Check whether there
is braking drag.
2.
Check whether wheel
bearing is seriously
abraded or damaged.
3.
Check whether the
middle sleeve of hub
is missed or too
short.
Check tire
pressure
Low pressure
Normal
pressure
Inflate as required
Check whether oil leakage occurs
in fuel tank, fuel switch, fuel pipe
or carburetor.
Solve problems based on
actual situation
Check the proportion of
mixed combustible gas.
Normal combustible gas mixture
Mixed combustible
gas is too dense.
Mixed combustible
gas is diluted.
Check whether the idle speed
of engine is too high.
1.
Check whether the air filter
is blocked.
2.
Check whether the
carburetor float is too low.
3.
Check whether the main
measuring jet of carburetor
is too big.
1.
Check whether the
carburetor is blocked
inside.
2.
Check whether the
carburetor float is too
high.
Check and adjust the
carburetor.
Check whether ignition is
timely conducted with an
ignition timing lamp
Check whether the
driving belt of clutch is
slipping.
Check the ignition
system.
