um CHILL 125 cc. Service Manual page 41

 Difficult Starting.
ITEM OPERATION
1 Check whether the fuel pump pressure is about 250kPa at idle.
2 Pull out the spark plug, check whether the spark over is normal.
3 Remove the connector of the engine temperature sensor, and check whether the
engine start well.
4 With a little bigger throttle, check whether the engine starts well.
5 Pull out the injector, and crank the engine. Check whether the injection is normal.
6 Pull out the spark plug, check whether it is wet or not
7 Check whether the cylinder pressure is normal or not
CHILL 125 cc. SERVICE MANUAL AND EFI DIAGNOSTIC
RESULT
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
NEXT STEP
Next
Check the pump.
Next
Check the ignition system
Check the engine temperature sensor
Next
Clean the throttle body and bypass channel.
Next
Next
Clean or change the injector.
Dry the plug and combustion chamber.
Next
Engine is good
Check the engine
41