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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through June 11, 2008 » Installing R6 tail light on XB « Previous Next »

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Marshj
Posted on Friday, June 06, 2008 - 12:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Ok guys,

I received an LED r6 taillight from a friend, and I can do all the fabrication work to make a fiberglass undertail and rear tail section with no issues. But its this damn electrical that I have no understanding of-

I need to know if I have to install a resistor inline to the tail lamp before wiring it up- or can I wire it directly? will the stock power to the bulb taillight be too many amps and fry the LEDS? Anyone with knowledge on this topic please help me out-

Thanks
Jeff
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Xl_cheese
Posted on Friday, June 06, 2008 - 09:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The LED taillight should have the resistors built into it.

If not you'll need something to limit the current.

Do a google for LED array.
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Rah7777777
Posted on Friday, June 06, 2008 - 10:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

It should have a built in amperage regulator. if not then you will have some problems. But I can't imagine it not having one. but hell who knows.
just buy an XB Lights LED tail light and call it a day

-Robert
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Nik
Posted on Friday, June 06, 2008 - 10:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Just hook it up, it will only draw as much current as it needs. You only have to deal with resistors and things for turn signals because they don't draw enough current to trigger the flasher.
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Xl_cheese
Posted on Friday, June 06, 2008 - 11:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Just hook it up, it will only draw as much current as it needs. You only have to deal with resistors and things for turn signals because they don't draw enough current to trigger the flasher.

LED's have a voltage drop, but not a resistance. You connect 12V from the battery across them and they will pop.

You need a series resistor to set the current.

http://led.linear1.org/led.wiz
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Rah7777777
Posted on Friday, June 06, 2008 - 01:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

you can easily apply too much voltage/amperage and blow and LED.

But i'm willing to bet since it was designed for another bike that it will work just fine on yours. most bikes are around 14 volts when running (off idle) so since it was designed for that measurement, odds are it will work like a champ on your bike.

I say hook it up and let it be. If it does blow, then you can get another off line pretty cheap.

Can you see the circuit board? if so post a pic and I can tell you exactly what you need if anything.
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Nik
Posted on Friday, June 06, 2008 - 03:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

LED's have a voltage drop, but not a resistance. You connect 12V from the battery across them and they will pop.

You need a series resistor to set the current.

http://led.linear1.org/led.wiz


That would be true if he was hooking up raw LEDs, not a prewired tail-light unit. It should be made up of a several strings in parallel of LEDs, voltage regulators, and the necessary resistors.

I've seen the the r6/1 lights used on other jap bikes fine without any such concerns. Just check it with a cheap multimeter if you're really that paranoid.

(Message edited by nik on June 06, 2008)
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Notmyrealnamedot_com
Posted on Friday, June 06, 2008 - 04:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Once your finished, please post pics!
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Marshj
Posted on Saturday, June 07, 2008 - 12:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Alright- thanks very much guys, appreciate it. You guys supplied to info I was looking for. Robert and others, Ill snap some pics of the internals tomorrow- or just hook it up, i did get it for free
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Krueger08xb12s
Posted on Saturday, June 07, 2008 - 03:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Hey make sure you post a picture of this once it's done or almost done. I thought of doing something similar to this with my 12S!

Thanks
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