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New battery for stock 58 Duo Glide

Electrical issues
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58kicker
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New battery for stock 58 Duo Glide

#1

Post by 58kicker » Thu Feb 16, 2012 10:09 am

Hi!

I need a new battery for my 58 PAN kick only 6volt 3brush bike.

From a local store I can buy a sealed 6 v/14 ah, that will fit in the original horseshoe oiltank.

My concern is whether it will have enough power(amps) - I've previously read that the original Harley H2 battery came with 6 v 22 ah.

What do you think, should I choose an original H2 acid battery or a maintenance-free sealed battery, which costs only 1/4 of the original - any recommendations is much appreciated?

I bought the bike in september 2011, and only went on a few small trips before winter came(I live in Denmark), but it seem, that the bike drains the battery when I turned on the light, so I hope a new battery will fix the problem.

The generator seems to be charging fine - it put out over 7 volts when I twists the throttle, but I suspect that the headlamp also could be a problem - it's an aftermarket copy, and it says H4 on the glass. I have not checked the bulb yet, but it may well be, that it draws too many watts - what bulbs do you use in the headlamp?

Anders



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Re: New battery for stock 58 Duo Glide

#2

Post by 1950Panhead » Thu Feb 16, 2012 2:17 pm

The battery is a reservoir, 14ah will work fine.
The key here is the generator, if the generator puts out enough to run your lights and coil all is well.
If the generator does not put out enough it will draw from the battery which will eventually go dead.
Jerry

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Re: New battery for stock 58 Duo Glide

#3

Post by pan620 » Thu Feb 16, 2012 2:57 pm

H4 is a halogen, lots brighter, is it 12 volt?

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Re: New battery for stock 58 Duo Glide

#4

Post by RUBONE » Thu Feb 16, 2012 3:51 pm

58kicker,
Why does your '58 have a three brush generator? They were originally two. And an H4 halogen headlight (usually 55 watts) will never work on a stock 6V H-D system, it draws too much amperage and the generator cannot keep up with it combined with the rest of the equipment draw. (watts divided by volts equals amperage draw). It is the headlight, not the battery that is the problem.
Robbie

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Re: New battery for stock 58 Duo Glide

#5

Post by 58kicker » Thu Feb 16, 2012 5:37 pm

Hi Robbie

Sorry, my bad - it's a standard two brush generator.

I will check the headlight and bulb tonight.

Anders

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Re: New battery for stock 58 Duo Glide

#6

Post by 58kicker » Thu Feb 16, 2012 6:37 pm

Hmm - I opened up the headlamp, and can see, that it's an Osram Bilux 7950 6 volts 45/40 Watt bulb, that has been modified to fit in a Lucas H4 12 volts parabolic reflector.

Does this bulb draw too much amps for a standard 6 volt system?

If I'm running with the ignition in position 1, the bike will run without problems, but when I put it in position 2 and turns the headlamp on, it won't be long before the engine begins to die - if I quickly turns the ignition back in postition 1, I can drive on without any problems.

Anders
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Re: New battery for stock 58 Duo Glide

#7

Post by Bigincher » Thu Feb 16, 2012 8:31 pm

Anders, I think you just answered your own question there.....

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Re: New battery for stock 58 Duo Glide

#8

Post by 58kicker » Thu Feb 16, 2012 11:09 pm

Yes, if I understand this correct - this bulb will use 6,67 amps on low beam, how much is my generator designed to put out?

Any recommendations for another bulb?

http://www.donsbulbs.com/cgi-bin/r/t.pl ... b=R2&g=&f=" onclick="window.open(this.href);return false;

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Re: New battery for stock 58 Duo Glide

#9

Post by Bigincher » Thu Feb 16, 2012 11:38 pm

No, sorry -- I won't be making any recommendations, but I will remind you of Robbie's last post in which he offers the formula to arrive at the desired end results.

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Re: New battery for stock 58 Duo Glide

#10

Post by azpaul50 » Fri Feb 17, 2012 12:06 am

I installed an Eagle-Pichler (?) 6V, 14AH battery in my '63. It has been the best (battery) experience I've ever had! After replacing tall H-2's or vent-cap equivalent every 2 years (x5), I finally decided to try something different. I live in the hottest place in the US so no battery lasts long. So far, this sealed battery has alredy outperformed all the others I've tried through the years. I left my ignition on for hours and where before the battery would be dead, this one didn't even notice! I believe the one you described will work just fine or better! Mine is! - azpaul50

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Re: New battery for stock 58 Duo Glide

#11

Post by azpaul50 » Fri Feb 17, 2012 12:11 am

.... and the cost was $20 less than a comparable H-2! I had accumulated all those tall batteries over the years and finally took them to our local battery shop (Interstate). I got $9 each for the carcasses and ended up getting my new battery almost for free! FREE, FREE, FREE AT LAST.... something Harley-related for FREE!

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Re: New battery for stock 58 Duo Glide

#12

Post by 58kicker » Fri Feb 17, 2012 11:01 am

Thanks guys :D

I will buy a sealed 6 v/14 ah battery and try to find a 6 volt 25/25w or 35/35w bulb, and see if this solves the problem.

Anders

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