HID headlight and charging system question.

[Ben L.]

Hello, I've been lurking around this forum a few days now and finally got around to joining! Anyways I bought my 1989 SB50P last week and already swapped in an UNI filter. This weekend I hope to install a BBK and gears.

Well tonight I went for my first night ride with the HID headlight I installed. I ran the power straight to the battery with a toggle switch. My question is, is there a way of modifiying the charging system? The light works great for a few minutes then once I start using brakes and blinkers the battery charge must drop and kills the headlight. Has anybody had luck running HID's?

Thank you for any help!

[Trafficjamz]

Hello, I've been lurking around this forum a few days now and finally got around to joining! Anyways I bought my 1989 SB50P last week and already swapped in an UNI filter. This weekend I hope to install a BBK and gears.

Well tonight I went for my first night ride with the HID headlight I installed. I ran the power straight to the battery with a toggle switch. My question is, is there a way of modifiying the charging system? The light works great for a few minutes then once I start using brakes and blinkers the battery charge must drop and kills the headlight. Has anybody had luck running HID's?

Thank you for any help!

I constantly have to charge my battery when using my hid's

I also use a bigger amp/hour battery than stock.



What is the rated output of the stock voltage regulator?

Maybe you could wire a second one in parallel and double the charge rate of the battery.

[ZMUD]

I constantly have to charge my battery when using my hid's

I also use a bigger amp/hour battery than stock.

What Tjamz said!!!


I get about 6-8 hrs of run time before I have to recharge. and I run a 5amp battery.

The HID is awesome but it kills my battery. I run a 2001 headlight and use a hi/lo H4 bulb so when the HID act's up I still have a regular head light.

And if you get a ac/dc converter you can run your hi/lo switch on the scooter instead of a toggle.

[Bear45-70]

Also adding a uni filter without rejetting the carb is asking a seized engine from to lean a fuel/air mixture.

[Ben L.]

Thank you! I will be changing my battery fairly soon, also I'm gonna check the voltage regulator and see if I can modify it at all. I did rejet after switching the air filter.

Have any of you had problems after changing the battery with the HID dimming when using the brakes or blinkers?

[eliteguy50]

LED tail light bulb helps.

[Bear45-70]

LEDs reduce power consumption while HIDs suck power like a Black Hole.