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  • 3 Post By ashwinprakas
  • 1 Post By ashwinprakas

Thread: DIY: Motorcycle Battery Eliminator

  1. #1
    Rusted ashwinprakas's Avatar
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    Icon12 DIY: Motorcycle Battery Eliminator

    This is one of the oldest mods in the book which now seems to have gone out of fashion due to increasing electrical dependence and is only seen done in survivalist builds.

    Anyways the reason for me opting for the same is due to my stock battery crapping out and today being one of those rainy days I thought of going with the more economical(Under Rs.100/-) and permanent route i.e capacitors.

    Requirements:



    • 4700uF 50V Capacitor.
    • Wire and Clips matching your stock harness.
    • Soldering Kit.
    • Heat-shrink sleeve.


    Procedure:

    Determine the polarity(either one or both of the poles would be marked, look for it) of the capacitor and go ahead with the wire coding, soldering and insulation bits, and you'll end up with something like this.

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    Now go ahead and scrap your battery and also get rid of any defunct parts such as the battery clamp which would cease to serve any purpose going forward and connect the capacitor to the exact same poles that connect to the battery i.e (+=+) and (-=-).

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    Secure the capacitor so that it doesn't move around and break contact or short out.

    Name:  DSC00085.jpg
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    Fine Tuning:

    Raise the idle(mine was set very low from factory) a bit to make sure that the lights stop flickering and the horn works fine at idle, and you're done.

    Cheers.
    A.P.
    Motorcycling Experience:
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    2011 ~ 2015 Hero Honda Karizma R (Sold at 56.5k)
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    2015 - Bajaj Pulsar 220F (Currently 31k) < Garage Queen!
    2017 - Bajaj CT100B (Currently 21k) < 'Golden Quadrilateral' Runner!

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  2. #2
    Moderator Samarth 619's Avatar
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    Thumbs up Re: DIY: Motorcycle Battery Eliminator

    DIY approved.

    Can you suggest a use case for a comparatively modern bike, say a 2008 Pulsar?

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    Default Re: DIY: Motorcycle Battery Eliminator

    A 15,000uF/50V Radial Electrolytic Capacitor (15000uf / 50 volt) would work Excellent, and its under 150 Rs., A 15,0000uF capacitor will hold much more charge.

  4. #4
    Rusted ashwinprakas's Avatar
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    Default Re: DIY: Motorcycle Battery Eliminator

    Quote Originally Posted by Samarth 619 View Post
    DIY approved.

    Can you suggest a use case for a comparatively modern bike, say a 2008 Pulsar?
    Better I'll generalize.

    Motorcycles with DC Ignition:

    Your CDI is DC powered hence without a battery or a properly functioning one your motorcycle wont start(RE) or would not run right(ZMA).

    In these motorcycles using a Capacitor alone would enable the motorcycle to run without a battery and a capacitor connected parallel to the battery would enable the motorcycle to run irrespective of the battery's condition, plus being more efficient it would ensure that your electrical's work better.

    Motorcycle with AC Ignition:

    Your CDI is powered by the alternator so irrespective of what the condition of the battery is your motorcycle would run but your electrical's still depend on the battery so without a battery your electrical's wont work and with a compromised battery they wont work well, so using a standalone capacitor would ensure that everything would without the need for a battery, and if by chance you have a self starter and depend on the battery then you can connect the capacitor parallel to the battery so again it would ensure than your other electrical's work more efficiently.

    Thumb rule:

    If you don't have a kick starter then connect the capacitor parallel to the battery so that if your motorcycle is DC then in the event of the battery crapping out you can still push start your motorcycle or if your motorcycle is AC then your electrical's would work more efficiently even when the battery is not at its optimum.

    If you only have a kick starter then scrap the battery and go for a capacitor, irrespective of whether AC or DC your motorcycle will run better as long as you've done the math.

    If you have both a self starter and kick starter then it is still better to have a capacitor for either of the above stated reasons.
    Last edited by ashwinprakas; 6 Days Ago at 05:21 PM.
    Samarth 619 likes this.
    Motorcycling Experience:
    2000 ~ 2017 Y2K Kinetic Zoom (Disposed at 15k)
    2011 ~ 2015 Hero Honda Karizma R (Sold at 56.5k)
    2013 ~ 2014 Bajaj Discover 100 4G (Sold at 16.5k)
    2015 ~ 2017 TVS Wego (Totaled at 18k)
    2015 - Bajaj Pulsar 220F (Currently 31k) < Garage Queen!
    2017 - Bajaj CT100B (Currently 21k) < 'Golden Quadrilateral' Runner!

    My Rants!:
    Thoughts & Suggestions about Motorcycling
    Travelogues

  5. #5
    Moderator Samarth 619's Avatar
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    Thumbs up Re: DIY: Motorcycle Battery Eliminator

    Quote Originally Posted by ashwinprakas View Post
    Better I'll generalize.

    Motorcycles with DC Ignition:

    Your CDI is DC powered hence without a battery or a properly function......
    Cool. Thanks for the details and the awesome post.

    I guess the bike I've quoted (Pulsar 2008) is of the second type (with AC ignition). And that's what raised my question. Because, I was in an unlucky situation where my battery had to be removed from the bike.
    The bike started easy, but its console was off, and the console too started moments later.

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