When i brake the brake lights do not light up on my yamaha ybr 125 2009 model.

ring Yamaha dealer they will tell you what the codes mean.

cor that reminds me of old days when we used to disconnect our front break light switch
so the police could not see you breaking when your speeding

any way try looking under your front break lever you will find two wires going into it just where the switch gear clamp is
failing that probably the problem lies inside your headlight

Please check the brake switch and relay for malfunction

Does the bike have an Immobiliser?


If so this maybe the reason you have no spark.....
When did the problem start? Coils rarely are the cause of no spark.