Under seat battery ??

Discussion in 'Airheads' started by SeikoKid, Sep 23, 2013.

  1. SeikoKid

    SeikoKid Adventurer

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    Would like to know more about how the battery for an R65 can be supported in the seat?
    Mentioned have been slimline glass batteries but my research has shown they are expensive?

    I am wanting the seat to remain flat to allow 2 riders. Is it possible? Are there any links please

    Thanks
    #1
  2. DaveBall

    DaveBall Long timer

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    What is wrong with the original battery mount?
    #2
  3. R100LT

    R100LT Chasing 11

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    Give me a few days and I will post the pics of hiding the battery in the air cover of my R65 . Been " pissing " down here .. wettest September in 90 years
    #3
  4. sammm

    sammm Adventurer

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    I've seen a few airheads where the battery rests in a 'dropped box' in the subframe. Just as though the battery is going to be hidden in a cafe cowl, but dropped 2" to make way for a bench seat. Looked good, and quite subtle. Can't find a picture of it at the moment, though.

    Another option would be hiding it below the gearbox/swingarm. I prefer this option, personally, and would definitely be doing it if I were making my bike for 2-up riding:

    http://www.bikeexif.com/bmw-r80-2
    #4
  5. SeikoKid

    SeikoKid Adventurer

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    that would be great to see some pics please when you get time :)
    #5
  6. Sabre170

    Sabre170 Been here awhile

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    I made a little box (painted it black) for mine and mounted it under my seat. I'm still able to use my stock 2 person seat.

    [​IMG]
    #6
  7. big_mark

    big_mark Adventurer

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    Lithium batteries seem to be a popular choice. They are smaller though no less powerful than the stock battery. Weigh a lot less too, so you can fit them under a seat hump, for example, without messing up your bikes weight distribution.
    #7
  8. supershaft

    supershaft because I can

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    +1. Longer battery cables and most always moving the weight to a worse spot as far as handling is concerned. It's usually a loose/loose proposition but that is usually what going for a look gets you. Look at choopers.
    #8
  9. SeikoKid

    SeikoKid Adventurer

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    I like the sound of lithium batteries but they do cost . Some one elsewhere mentioned glass matt slimline batteries ?

    I'd like to hide the battery under the seat to clean up the frame. I want it though to not be visible
    Some great ideas mentioned here , especially the under gearbox method. here in the UK I would suffer with that due to the amount of rain we get!
    Hidden away , nice n dry please

    Looking forward to seeing the air box method :)
    #9
  10. Padmei

    Padmei enamoured

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    Here's what I did for Schmidt's one. The steel was a bit thin so made another with thicker steel & a tad longer so I could mount a main switch on it. I have a different seat on now which drops down lower hiding it a bit more.
    I found those Motobatts are actually quite cheap for their benefits (for an off roadish bike anyway)

    http://advrider.com/forums/showpost.php?p=17382973&postcount=549
    #10
  11. Sabre170

    Sabre170 Been here awhile

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    1+

    I like this. Very similar concept to what I did, but this is a buch better build than mine. I like the "wings" that hold it on the frame.....I used some electrical conduit holders, and seemed to work fine....not neary as clean of a look as yours.
    #11
  12. Padmei

    Padmei enamoured

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    Damn i'm a sparky & didn't even think about that. Thanks for the compliments - I don't often get them about my modifications so I'm taking it :D



    [​IMG]
    #12
  13. _cy_

    _cy_ Long timer

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    anyone worried about cost of slimline AGM would not be a candidate for a properly sized LiFePO4.

    anytime one moves from original battery tray/cables. be extra careful with positive side connections. this goes X10 for LiFePO4 batteries. they discharge violently at full tilt. heat generated are equal to Arc welding.

    dead shorts on LiFePO4 installs on custom bikes are suspected of causing the fire that burnt it to a crisp.
    #13
  14. edray

    edray cascadian

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    diggin the stickers..
    #14
  15. Sabre170

    Sabre170 Been here awhile

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    Vorgoingon/vorwerkingon..... "Before Going On"/"before working on"? Is my horrid translation correct?

    I call that a smart man's idiot switch.

    Is that simply an inline battery cut-off switch? If so, how beefy (current rating) is that switch? I'd think that when starting the bike, you'd pull enough juice to toast that switch...no?
    #15
  16. Padmei

    Padmei enamoured

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    Your translation is pretty good for Padmeigerman - it's really just phonetic 'for going on' etc.

    That switch is my security device. I don't have a key so it just cuts power to the same similar circuits as the key would have. Unfortunately I am one of THOSE PO that messes around with the wiring. In fact I dislike standard BMW wiring so much I get rid of half of it & run the basics.

    I'd agree with Cy about the battery terminals when making a new one up. I cut one side of my box down but also have some foam as a buffer in case it gets dislodged.
    #16
  17. SeikoKid

    SeikoKid Adventurer

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    Would anyone be able to show me what their seat base looks like , I think I found someone who can help but would be great to see some finished units for guidance please
    #17
  18. Houseoffubar

    Houseoffubar HoFmetalworks.com

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    You can get a good lithium battery for $100-150. not free, but I paid $105 for my stock lead battery...
    #18
  19. flying_finn

    flying_finn motomessiah.blogspot

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    How about mounting the battery up under the tranny. This should help you obtian a lower CG thus better handling.
    #19
  20. rymore

    rymore Adventurer

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    This is a great idea! I wanted to get a Lithium battery for my seat hump, but with the high price and all the mixed reviews on Lithium batteries in the cold, I think I'll be doing something similar to this.

    It's obviously not as hidden as under the seat hump, but compared to other alternatives this looks great, and allows me to keep my centre stand.

    Thanks for posting the pic!
    #20