Cheap battery mod save 5-6 pounds

Discussion in 'Motorcycles - Ride-NY' started by SaratogaLED, Apr 11, 2017.

  1. SaratogaLED

    SaratogaLED Leecher

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    The Lithium Iron batteries are getting cheap. I put the 1.25 pounder in the 1000RR and the 2 pounder in my wife's Civic. Starts both with ease so far. I left my bike sitting for about 2 months and it fired right up. The battery recharges in less than 2 minutes after starting the bike.

    $73, weighs 1.25 pounds

    $100, weighs 2 pounds


    IMG_20170217_173554692.jpg
     
  2. SaratogaLED

    SaratogaLED Leecher

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    I followed Doug's example and grabbed a MikeyMoto style rear rotor, although this one is the ebay version, weighs in at exactly 1 pound. That will shave off .75 pounds of rotating unsprung driveline weight which is worth ~8 pound sprung weight?

    ~$70 shipped

    rotor MM.jpg
     
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    Last edited: Apr 11, 2017
  3. capitalcrew

    capitalcrew Journeyman Staff Member

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    I didn't realize those lithium batteries were getting so cheap. I was looking at one for my race boat a couple years ago and it was more like 150-200 bucks. That's awesome.
     
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  4. SaratogaLED

    SaratogaLED Leecher

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    Kind of funny that they are cheaper than stock lead batteries, same for the Civic, and 25 pounds lighter for what its worth. Hopefully they will hold up for a few years at least.
     
  5. RocketPunch

    RocketPunch Leecher

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    I should do the rear rotor mod on my sv.
     
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  6. Ilya

    Ilya Leecher

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    I know in cars you can buy adapters or whatever if the battery is too small...etc...but how do bikes work? I probably need to get one anyway for my KLR and wouldn't mind losing a couple of pounds on the Vulcan S.

    EDIT: Or are these built the same size, just due to the materials alone are lighter? In that case, disregard my comment.
     
  7. capitalcrew

    capitalcrew Journeyman Staff Member

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    You find one that fits, they're just light as fuck.
     
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  8. Vovchandr

    Vovchandr Grasshopper Grasshopper

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    I had it on my wish list for years lol
     
  9. SaratogaLED

    SaratogaLED Leecher

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    My bike had the Yuasa YTZ7S stock and the WPS HJTZ7S lithium was a perfect fit and it fit under the stock rubber strap. But for the car the lithium battery was way too small so I strapped it down with zip ties and I had to adapt the battery post terminals to a ring terminal.

    It is worth mentioning that the $99 battery can start the civic easily, but it has small capacity relative to the stock battery for listening to the radio etc.
     
  10. capitalcrew

    capitalcrew Journeyman Staff Member

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    Don't they need a special charger too? I just bought a battery tender to keep my batteries fresh but I think the lithium ones require a different tender
     
  11. RocketPunch

    RocketPunch Leecher

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    Well, they don't make one for sv, just gixxer.
     
  12. Vovchandr

    Vovchandr Grasshopper Grasshopper

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  13. SaratogaLED

    SaratogaLED Leecher

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    It does seem that normal 12V trickle chargers dont give 12V LiFe batteries a full top off, but the bike itself will. The upside is these batteries should not need a trickle charger and should hold their charge all winter and fire right up in the spring. If your bike uses a lot of standby power you could disconnect the negative terminal during the winter.

    If you need to revive a dead 12V LiFe battery, one option is to start your car or bike and hook up jumper cables to the lithium. You can do it in increments if you are concerned about overheating it. Or you can buy a small 12V LiFePO4 charger.
     

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