um CHILL 125 cc. Service Manual page 46

 Missing Spark
ITEM OPERATION
1
Pull out the spark plug, check whether the spark over is normal.
2 Check whether the timing is right
3
Check the type and the clearance of the spark plug.
CHILL 125 cc. SERVICE MANUAL AND EFI DIAGNOSTIC
RESULT
Yes
No
Yes
No
Yes
No
NEXT STEP
Next
Check the ignition system
Next
Adjust the timing
Help
Change the spark plug
46