Bad Boy 550cc - Troubleshooting and Accessories; Engine, Battery, and Machine Issues

Troubleshooting
11-1
ENGINE TROUBLESHOOTING
If something is wrong with the engine, refer to the table below for the cause and its corrective
countermeasure.
Trouble Cause Countermeasure
Engine is difficult to start or
cannot start.
 No fuel flow
 Check the fuel tank and fuel
filter。
 Check the electric fuel pump.
 Check the injector.
 Check the ECU with Motor Scan
KF9012
1.
 Replace filter electric fuel pump
injector and ECU If necessary.
·Water is in the fuel system
 Check to see if the fuel cap is
tight.
 In winter, oil viscosity increases ,
and engine revolution is slow.
 Use oils of different viscosities,
depending on ambient temperatures.
 Battery becomes weak and
the engine does not turn over
quickly enough.
 Clean battery cables and terminals.
 Charge the battery.
 In cold weather (-15 ),℃ always
remove t he battery from the vehicle,
charge and store it indoors. install
it on the vehicle only when the
vehicle is going to be used。
 Insufficient fuel.
 The injector is clogge
d.
 Crankshaft position sensor is
ba
d.
 The air cleaner is clogged.
 Spark plug is dirty or fouled.
 Ignition coil is b
ad.
 Check the fuel system.
 Clean or replace the injector.
 Replace crankshaft position sensor.
 Clean or replace the air cleaner.
 Clean or replace the spark plug.
 Replace the ignition coil.
Engine stops suddenly
 Check with the diagnostic
instrument (Motor Scan
KF90121 ).
Engine overheats
 Engine overloaded  Shift to lower gear or reduce load.
 Low coolant level.
 Fill cooling system to the correct
level
 Check radiator and hoses for
loose connections or leaks.
 The motor driven fan does
not turn.
 Check to see if the fuse is blown.
 Check the electric system.
 Dirty radiator core or grille
screens.
 Remove all trash.
 Coolant flow route corroded.  Flush cooling system.
If you have any questions, consult your local dealer.
Engine power is
insufficient.