KEEWAY FACT 50 4T Maintenance Manual page 25

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