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Rickman
  • Rank:XL Board Member
  • Posts:3
  • From:USA

Date Posted:03/21/2013 12:47 PMCopy HTML

Hey Guys, I just picked up a really clean 1979 XR500, 2000 original miles and garaged all its life. In Arizona I can ride it registered with just a headlight, tail & brake light. It does not have a battery and I want to add a brake light. I was going to tee off the hot wire that runs the tail light and run a wire to the brake light switch. The system is 6volt. I was going to add a dual filament socket and a dual filament bulb. Is there any reason why this would not work? Any suggestions? Thanks, Rickman
timer #1
  • Rank:Diamond Member
  • Posts:537
  • From:Canada

Re:79 XR500 brake light conversion

Date Posted:03/24/2013 3:52 PMCopy HTML

Rickman
Fixing up a 79 Xr 500 as well. My son & I do trail , access road type riding. Thinking of doing the same . Please let us know what you come up with. In my case i will probably never ride at night so i should not have any real issues. Maybe look at bike bandit & see if the Part # for the stator is the same for the XR 500 as the Xl 500. If different you may want to consider changing stators or maybe using led bulbs ( if you can get them)??  
Thanks
Timer
Rickman #2
  • Rank:XL Board Member
  • Posts:3
  • From:USA

Re:79 XR500 brake light conversion

Date Posted:03/26/2013 1:06 PMCopy HTML

What I did find out is that the dual filament bulb for a six volt is an 1154, when I did a search on an 1154 LED it showed that the 1157 LED supersedes the 1154.The problem I may run into is that the XR500 is an alternating current, AC, and the bulb may not work with that. I got the bulbs yesterday, I am expecting the dual filament tail light by Thursday. I bought a Maier universal dual sport tail light on Ebay. Once I install the tail light and brake light switch I will try the LED first, and then a regular 1154 if the LED does not work.
Another option I found was to place a small sealed gel battery in the air box on the right side behind the right side cover and to wire it to the tail light directly, with the stock wiring disconnected from the tail light. You would then use a toggle switch to turn on the power to the tail light before you go riding, and switch the light off when not in use. The tail light would run off the battery directly and would require charging weekly, due to the fact that the battery would be a power source to the tail light only and wired to nothing else.
Either way, I'll let you know what works. I've been tinkering on bikes for over 30 years.
Rickman #3
  • Rank:XL Board Member
  • Posts:3
  • From:USA

Re:79 XR500 brake light conversion

Date Posted:03/28/2013 1:02 PMCopy HTML

 The stator does not put out enough juice to really light the brake light. The stock tail light bulb is only 3 watts. The dual filament bulb is 21/5 watts. What I did is purchased an aftermarket dual sport tail light, disconnected the stock tail light completely. I placed a small gel 12volt 6 amp battery in the area behind the right side cover with a zip tie. There is a small area in there where the battery would of gone on an XL. The tail light is wired to the battery independently. The negative side of the battery to the tail light ground wire, with a small toggle switch in the right side cover, I ran the hot wire to the toggle, coming out of the toggle are two wires, one to the running light, the other to the brake light switch which is mounted to the frame just behind the side cover with a hose clamp. I then found a long brake light spring at the junk yard which I ran down to the brake pedal. I drilled a small hole in the brake pedal to accept the spring. When you flip the toggle switch on the tail light comes on, and the brake light works with the rear brake pedal. I wired in a trickle charger plug to the battery, and about once every other week I plug in the charger before I go to bed and I'm good to go in the morning for a couple more weeks. The tail light and battery are 12 volt and run completely independently from the rest of the bike.
After much research, this was what came up more and more. It all cost me about $55 total. Hope this helps.
timer #4
  • Rank:Diamond Member
  • Posts:537
  • From:Canada

Re:79 XR500 brake light conversion

Date Posted:03/31/2013 1:00 PMCopy HTML

It did. Glad it worked out for you.
Thanks
Timer



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