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Keep blowing headlight and brake light then I rev it

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Just purchased new brake light and headlight from honda and they worked fine , as soon as I revved it they both went really bright and blew ...

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Just purchased new brake light and headlight from honda and they worked fine , as soon as I revved it they both went really bright and blew ...

I would suggest checking the voltage regulator, either you don't have one or it is not working.

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No

Due to the plethora of information that has been provided I can only conclude that this bike (whatever that may be) is in dire need of a "Retro Encabulator". See link ........ LOL.

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Honda has shipped many XRs without having headlights that blow up.

Is your wiring not stock?

Sounds like the voltage regulator as suggested.

 

How to test a rectifyer

 

Harbor Freight has voltage testers.   I picked up one free during their sale.  Watch for coupons.

http://www.harborfreight.com/catalogsearch/result?q=voltage+meter

 

 

"The factory did the hard part, they turned a bunch of steel and aluminium into a running motor.

All I have to do is reproduce what they created.

Restore to factory specs. Not nearly as hard as what they did."

- Long time auto mechanic

Edited by Kev_XR

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It's an xr400 1999 , is the voltage regulator under the tank? Because looks like there's one behind headlight aswell ?

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Here is a wiring diagram for 96-04 XR400, classic XR AC lighting system that complies with USFS requirements for night operation.

A functioning voltage regulator would prevent bulb blowing.

 

The "AC Reg" in this diagram looks more like an AC/DC rect/reg. Aftermarket two wire 12 volt AC regs are available for about $13. A floating ground alternator with Pink and Yellow wires out are usually for DC systems, and the "AC reg is a four wire device,which is  usually a reg/rect. A close examination of your system with a VTM could tell the story.

 

xr4elect.gif

Edited by Chuck.

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Decided to just bridge off my standard 12v dc reg , a 35 watt headlight and 21 watt tail light shouldn't overload it

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