LED's are exhausting! - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 49 Old 04-26-2008, 05:43 PM Thread Starter
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LED's are exhausting!

I swear that I've seen someone on here who installed LED's in the end of the exhaust on a Vee. I've had no luck finding the thread again so I decided to give it a try myself because it looked pretty cool.

I've never wired up individual LED's before so I had to do a little research before I went at it. I wanted this to be as simple (and cheap) as possible so I decided to purchase LED's from www.superbrightleds.com and I got a couple of 12 volt regulators from Radio Shack.



I used the RL5-R5015 LED because it ran off 2 volts and I needed 6 of them per side. Since I was using the 12v regulator I wouldn't need any extra resistors or anything so all I had to do was wire them in series and each LED would get 2 volts, perfect! These LED's cost less than 30 cents each, a big difference from the $3 at Radio Shack.

I determined the best place to put the LED's would be on the flat surface around the tailpipe "stinger". I decided to line them up with the bolts in the muffler end and drilled my holes. 1/4" hole was all that was needed for the LED mounts.



I then slid the mounts in that will hold the LED's.



Once I had the spacing I realized that I wouldn't need any extra wire in between the LED's. All I did was solder them together, positive to negative, all the way around. I decided it would be easier to solder them all together then insert them into the holders.


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post #2 of 49 Old 04-26-2008, 05:52 PM Thread Starter
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Hit the submit button by mistake so I'll continue.

I realized that I needed a hole to run the wires through so I drilled a hole into the inside of the heatshield, you can see it if you look hard.



Then I inserted the LED's into their little brackets and threaded the wires into the hole I had just drilled. Unfortunately my measuring wasn't that great and I had to take it back apart once and add some wire in between a couple of the LED's, that'll teach me not to really measure.



Then all that was left to do was mount the heat shield back on the motorcycle, I tested the whole setup first to make sure I didn't screw it up. Doesn't look too bad so far.



The next side went a bit quicker since I'd already done it once and didn't make the same mistakes. Here's how it looks with one side lit up.



The LED's give a little different brightness depending upon what angle you look at them. This is with 11:00 am Arizona sun directly on them, I think they're pretty obvious for that.

I wasn't sure how I was going to wire them. My initial thought was to have them come on with the brake lights. I ended up taking a neighborhood poll and prevailing opinion was to have them come on all the time. I wired them into my front running lights (I have running lights in my front turn signals) and they seem to work okay. You don't get any pictures of the spaghetti under my seat as I have to tidy it up a little.

All told, this took me a couple of hours and less than $30 total. I think it looks pretty cool.

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post #3 of 49 Old 04-26-2008, 06:03 PM
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Originally Posted by Bisbonian View Post
All told, this took me a couple of hours and less than $30 total. I think it looks pretty cool.
Bonus is, it would only cost a Wee guy $15.00.
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post #4 of 49 Old 04-26-2008, 06:28 PM
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Bonus is, it would only cost a Wee guy $15.00.
They wouldn't spend that much
post #5 of 49 Old 04-26-2008, 06:56 PM
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But then the Wee could only turn in one direction!




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post #6 of 49 Old 04-26-2008, 08:58 PM
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Looks neat!

Minor suggestion:
The voltage regulators you are using (LM7812) have a dropout voltage rating of 2 volts (it drops 2 volts from the input terminal to the output terminal) - so you are actually only getting 12 volts when the input is over 14 volts. (the LEDs likely brighten up when the engine is rev'd?).
"LED ratings are specified by current, not voltage"
Therefore, a better choice when stacking LEDs is to regulate the current into the LEDs (typical ~25ma) using something like a LM317. (good article at http://www.otherpower.com/otherpower_lighting_leds.html ). Since the LEDs are going to run hot from the exhaust, they will likely be more reliable in current mode.

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post #7 of 49 Old 04-30-2008, 03:52 PM Thread Starter
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msi1259,

thanks a lot for the info. I had no idea on how to hook these up and this looked like the easiest way for me. I'll see how they hold up for a little while but then I might swap things around a little the way you suggested.

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post #8 of 49 Old 04-30-2008, 06:41 PM
 
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that looks awesome! great job!
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post #9 of 49 Old 04-30-2008, 06:43 PM
 
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Originally Posted by janiceclanfield View Post
But then the Wee could only turn in one direction!
what does that have to do with anything? They definitely don't affect the bike's ability to turn... They are running lights.
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post #10 of 49 Old 04-30-2008, 08:23 PM
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Can you take a couple of pictures of them at night? I think that is a great idea!!!

"Since I am about as mechanically inclined as a Sea Otter (which means I can use hard things to smash open softer ones), I was delightfully surprised when the bike started and ran perfectly after the PCIII install."

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