Scooterotica

My Li headlight isn't bright enough to ride at night, even with a halogen bulb fitted. Strangely, it brightens a lot when I apply the brakes (front and rear brake light switches fitted). Thought it might be a bad earth so now have 3 good earths - also changed the ignition, checked the switch & replaced the bulb holder and checked all connections. Still no change - can anyone help please??!!

Have you checked the rear bulb is correct way round? Thick filament to top for the brake.Are you on 6v or 12?

If you are on standard 6V check your rear lights earth as well as the above.

I'm on 12v - it's an MB set up with BGM stator. The rear bulb is the correct way round and the earth is good. I have no idea what it could be. Very occasionally the lights brighten on their own (without braking, suggesting earth problem) but that hasn't happended for a couple of months.

Might be worth checking the the stator lighting coils and wire first,then substitute another regulator and check the loom terminal and earth on the reg.