Under load headlight dies?

[cafeguy]

Lately at night when i lay on the throttle the headlight dies, kind of the opposite of what the bike has always done, anyone experienced this problem before? I know my charging system isnt great and ive been wanting to purchase a pma charging system and delete my battery for a while now, any suggestions would be great. Thank you.

 

[weekendrider]

Your brushes are too short and tipping up on the edge during acceleration.