headlight questions - Honda Rebel Forum
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post #1 of 15 Old 04-23-2019, 07:57 PM Thread Starter
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headlight questions

Hello everyone ,

I bought a 2003 honda rebel last labor day with 241 miles on it . I would like to place an led headlight on it so I bought a Wisamic 5-3/4" 5.75" LED Headlight , needless to say it will not fit in the stock bucket . So now I am trying to find a decent bucket the will fit on the rebel so I am wondering if this will fit [URL="http://www.amazon.com/gp/product/B01N0Y4WGS/ref=ask_ql_qh_dp_hza[/URL] here is a couple of pics it now has 1300 miles on it and I love it more today than when I bought it
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post #2 of 15 Old 04-23-2019, 09:17 PM
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Welcome. I can't answer your question about specific buckets that fit the Rebel, but with the right brackets, almost any would work.

A far easier solution would be to install an H4 LED bulb, which several here have done.

Keepin' all the left over parts. Gonna use 'em to build another bike!

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post #3 of 15 Old 04-23-2019, 09:25 PM Thread Starter
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I thought about going that route much simpler but I really like the way it looks on the bike lol
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post #4 of 15 Old 04-24-2019, 08:23 AM
 
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The bucket listed includes fork tube mounting brackets, as long as you like the new position and look, the specs says it will hold a 5.75 light.

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post #5 of 15 Old 04-24-2019, 06:26 PM Thread Starter
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so I bought the new bucket today , delivery by Friday will post some before and after pics Fri or Sat night .Thanks for the help
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post #6 of 15 Old 04-26-2019, 09:24 PM Thread Starter
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all done ,nice and bright and even looks good will not let me post pics for some security token or something
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post #7 of 15 Old 04-27-2019, 08:34 PM
 
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There was some discussion in the past from others who encountered problems over time that putting an LED headlight on these bikes tended to cause premature electrical system failures. Thinking was an LED takes less current, leading to the regulator needing to dissipate more current than it was designed for, as the draw of a standard bulb was designed as part of the electrical system. It will be interesting to see if you encounter an issue or not.

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post #8 of 15 Old 04-30-2019, 12:59 PM
 
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Would 'current' need to be dissipated? Or voltage? I don't see how 'current' would need to be dissipated. But then I don't know how the Rebel electronics work. Know a little about electronics, not much.

No premature failure here after 10.5 months with a 25w headlight H4 LED. Also the license plate tail light is LED. Not blinker lights.

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post #9 of 15 Old 04-30-2019, 05:38 PM
 
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Quote:
Originally Posted by Lexiyntax View Post
There was some discussion in the past from others who encountered problems over time that putting an LED headlight on these bikes tended to cause premature electrical system failures. Thinking was an LED takes less current, leading to the regulator needing to dissipate more current than it was designed for, as the draw of a standard bulb was designed as part of the electrical system. It will be interesting to see if you encounter an issue or not.
That doesn't sound right. All that would happen is that there would be less resistance on the engine. It's not like the engine is set to a specific RPM/power output at all times, so it'll just be that much easier to spin it (obviously very marginally so, this isn't something you could notice or even measure without really high quality equipment). The regulator won't factor into this, it'll just draw less AC current from the stator, and the stator will have less impedance with less electrical load. Couple of ways to think about this:

1. Imagine you disconnect the output from the rectifier completely. It's still got 12 V on it, but 0 current. Would it burn out? No, it's not like the voltage will go to infinity and it's definitely not shorting the output through some variable resistor to "burn" some kind of extra current. If this was the case, all your USB wall chargers without a phone plugged into them would blow up.

2. Imagine that you are on a bicycle with a stator and a regulator. You connect a very big load to the output of the regulator, something like a microwave oven. When the oven is on, the pedals will be harder to push because of the impedance in the stator. Soon as the microwave turns off, the pedals will be easier to push. You can actually try this if you have some basic electronics on hand.

Again, I cannot emphasize enough that the amount of additional resistance to the engine is tiny. We are talking about an engine that is rated for 16 hp = 11,931 Watts. A 12 V 2 A bulb is 24 Watts. Reducing that to a 5 W bulb will save you 19 Watts, or 0.16%. You can triple that for the inefficiencies in the system if you want, and still have less than 0.5% power gains. Losing 1 lb of weight would for comparison save you 0.19% of the power/weight ratio, so before I start a crazy trend of everyone thinking they are making their Rebels faster with this, you'd be better off losing 10 lb than swapping all the light bulbs.

Having said that, I replaced my headlight bulb with a $5 Chinese LED. If anyone wants I can link to my write-up about its brightness and how it all went. Basically though, super happy with it. It also allowed me to add fog lights for even more night time lighting. All my lights except what's in the clock are currently LED, and I'm super happy with it.
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post #10 of 15 Old 04-30-2019, 06:23 PM Thread Starter
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I am looking into changing all of mine out to led. maybe even daytime running lights as well . I love the new headlight makes riding at night much less scary .
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