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  1. #1

    Default Help - 81 GS450L Build

    hi all, long time reader, first time poster.

    just finished my first build on my 81 GS 450... long story short, i didnt make it.

    used a lithium ion battery and looks like i probably should have read up on my charging system before i did that. not sure if i wired the bike wrong or the bike cant handle the lithium batteries.

    not to mention, i lost the headlight at about 55 mph.

    thoughts? thanks..


    Attached Thumbnails Attached Thumbnails IMG_5280-2.jpg   IMG_3601.jpg  

  2. #2
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    Losing the lights when you need them really sucks.Had it happen to me on my bike.Lost everything in pitch black night on a road with a fifty mile an hour speed limit.

  3. #3
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    I feel like I remember that this can happen if you have bad ground... like the battery will overheat and stuff. I can't remember for sure. Maybe check it out though.

  4. #4

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    Quote Originally Posted by ScottArcher View Post
    I feel like I remember that this can happen if you have bad ground... like the battery will overheat and stuff. I can't remember for sure. Maybe check it out though.
    i don't think it's a ground issue... i was thinking my problem is related to the charging system

  5. #5
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    So, my advice to anyone thinking about using these batteries: don't. It may save weight, may save size, but they have some pretty huge downsides when compared to traditional lead-acid. I've seen many people have this same problem, and why? Because you have to charge these batteries using their special trickle charger. Even if the battery is just a *little* bit drained, hooking it up to a regular charger, or your charging system and expecting to charge back up means you run the risk of exactly what happened here. I know a lot of people like running bikes with kick-start, in case their battery drains down, they can still start it, without a jump. Well, if you run one of these batteries, that's a risky proposition, because you're just begging to have a nice fire under your ass. Same with a jump or push start. And in the case of these GS' bikes, you've got the issue with the shoddy stock charging system- I blew through two R/R's on mine before I said 'fuckit' and got a mosfet. I'd hate to see what would have happened if the R/R gave up with one of those Li batteries.
    /rant

    Anyways, check your R/R. Those bikes like to chew them up and spit them out. Read the stator papers: http://www.thegsresources.com/statorpapers1.php, and test as they command, and you should find the issue. Also, make sure the housing on the R/R is grounded. Learned that the hard way after the first one died.

  6. #6

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    Quote Originally Posted by Westboundbiker View Post
    So, my advice to anyone thinking about using these batteries: don't. It may save weight, may save size, but they have some pretty huge downsides when compared to traditional lead-acid. I've seen many people have this same problem, and why? Because you have to charge these batteries using their special trickle charger. Even if the battery is just a *little* bit drained, hooking it up to a regular charger, or your charging system and expecting to charge back up means you run the risk of exactly what happened here. I know a lot of people like running bikes with kick-start, in case their battery drains down, they can still start it, without a jump. Well, if you run one of these batteries, that's a risky proposition, because you're just begging to have a nice fire under your ass. Same with a jump or push start. And in the case of these GS' bikes, you've got the issue with the shoddy stock charging system- I blew through two R/R's on mine before I said 'fuckit' and got a mosfet. I'd hate to see what would have happened if the R/R gave up with one of those Li batteries.
    /rant

    Anyways, check your R/R. Those bikes like to chew them up and spit them out. Read the stator papers: http://www.thegsresources.com/statorpapers1.php, and test as they command, and you should find the issue. Also, make sure the housing on the R/R is grounded. Learned that the hard way after the first one died.
    17v at idle isn't good for any battery! imagine at full throttle.... really wish i checked this before what could have been a much worse situation than it was.

    the testing begins...

  7. #7
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    Yeah, no bueno. Had a buddy take mine out for a spin when we were on vacation, and after a couple hours without him returning, we got concerned about his well being. We tried calling him, but of course, the fucker had left his phone in the cabin with us. A few minutes later, some random local drops him off, and he says the bike died on him. I went to go pick up the bike in my truck, and when I tested the R/R output, it was giving me weird readings on the DC setting- flipped it to AC, and I was getting unrectified 23VAC straight to the battery. Would hate to see what that'd do to a lithium battery.

  8. #8

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    Quote Originally Posted by Westboundbiker View Post
    Yeah, no bueno. Had a buddy take mine out for a spin when we were on vacation, and after a couple hours without him returning, we got concerned about his well being. We tried calling him, but of course, the fucker had left his phone in the cabin with us. A few minutes later, some random local drops him off, and he says the bike died on him. I went to go pick up the bike in my truck, and when I tested the R/R output, it was giving me weird readings on the DC setting- flipped it to AC, and I was getting unrectified 23VAC straight to the battery. Would hate to see what that'd do to a lithium battery.
    luckily I had somebody following me, but the bike died as I was on my street. stopped the bike and saw large amounts of white smoke. with the power switched off nothing I could do but wait for the battery to finish its self destruction. wish I got a picture of the battery when I pulled it out, but was not trying to poke around a burned up battery for longer than I needed to.

    now its back to square 1 checking my wiring and the rest of the electrical/charging system.

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