um CBF 125 - Hard to Starting

CBF 125 AIR COOLING ENGINE SERVICE MANUAL
RENEGADE SPORT & SCRAMBLER X 125 EFI
111
STEP
OPERATION
SOLVED
FOLLOWING STEP
1
Check wether the fuel pump pressure is about 250kPa at
idle.
Yes
Next
No
Check the pump.
2
Check whether the ‘RMP’ data on the diagnostic tool shows
the real engine RPM.
Yes
Next
No
Check the crank sensor.
3
Pull out the spark plug, check whether the sparkover is
normal.
Yes
Next
No
Check the ignition
system
4
Check whether the cylinder pressure is normal.
Yes
Engine is good.
No
Check the engine
 Hard to starting.
STEP
OPERATION
SOLVED
FOLLOWING STEP
1
Check wether the fuel pump pressure is about 250kPa at
idle.
Yes
Next
No
Check the pump.
2
Pull out the spark plug, check whether the sparkover is
normal.
Yes
Next
No
Check the ignition
system
3
Remove the connector of the engine temperature sensor,
and check whether the enigne start well.
Yes
Check the engine
temperature sensor
No
Next
4
With a little bigger throttle, check wheterh the engine starts
well.
Yes
Clean the throttle
body and bypass
channel.
No
Next
5
Pull out the injector, and crank the engine. Check whether
the injection is normal.
Yes
Next
No
Clean or change the
injector.
6
Pull out the sprk plug, check whether it is wet or not
Yes
dry the plug and