Analysis Of Over Consumption Of Engine Fuel - ZONGSHEN ZS250GY-3 Service Manual

1.5 Analysis of over consumption of engine fuel

Yes
Support vehicle with side stand and
rotate wheel with hands.
Wheel turns hard.
[1]C h e c k w h e t h e r b r a k e i s
blocked.
[2]Check whether the axle is worn.
[3]Check whether the clapboard of
wheel hub has installed or is too
short.
Deal with it according to the
actual situation.
The mixed ratio of combustible
mixed gas is normal.
Check whether the rev of
engine is too fast.
Yes
No
Check whether
A c c o r d i n g
engine ignition is
to 1.1
timing.
Check ignition
system.
E n g i n e f u e l e x c e e d s
consumptive standard.
C h e c k w h e t h e r t h e
operation is correct.
W h e e l t u r n s
normally.
Check the tire
pressure.
Pr e s s u r e i s
normal.
Check whether fuel tank,fuel
tube is leakage and hoop of
tube is fastened.
Yes
Check the mixed ratio of
combustible mixed gas.
Combustible mixed
gas is too thick.
①C h e c k w h e t h e r a i r f i l t e r i s
blocked.
②Check wheher oxygen sensor is
working well.
③Check whether fuel nozzle is in
working order.
No
[1]Check whether motorcycle runs with
loads or without economical speed or with
low speed.
[2]Check whether the oil no. is correct.
P r e s s u r e i s
too low.
Inflate according to the
stated standard.
No
Combustible mixed
gas is too thin.
①Check whether fuel filter is
blocked.
②Check whether fuel nozzle
is blocked.
③Chec k whether oxygen
sensor is working well.
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