Wiring Problem

Hi, new boy here from England!!!
 
I've posted this already on the new users forum so apologies if you already read this!!!
 
I have a 1989 CBR600 which is great, apart from one little problem..... the front and rear lights flicker and dim when the indicator is switched on- does anyone have any suggestions??

DO YOU MEAN JUST THE SIGNAL LIGHTS?IF SO IT SOUNDS AS SIMPLE AS A BAD GROUND WIRE.CHECK OUT ALL YOUR GROUNDS FIRST.I HOPE THIS HELPS

Could be a charging or battery problem as well.  Does it do the same thing when you rev the engine?  Try holding the throttle at 5k rpms and see if you still get the dimming problem.