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Keep & Kill
Last Post: Crusty
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23rd May 2023
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XL FORUM LIFE MEMBER
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Join Date: Oct 2018
Posts: 204 Sportster/Buell Model: Sportster Sportster/Buell Year: 1977
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antigravity battery and cycle Electric generator/alternator
I have an older Shorai lithium battery on my 77 sportster and am using a cycle electric generator/regulator. I was told by a mechanic that he's seen these batteries fail a bunch because of the difference in electric "waves" from the generator (sorry, know that isn't the correct terminology but... )
Mine has been ok for several years. Just wondering if this is a known issue and if there are things people have done to help even out the charge.
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23rd May 2023
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Flat Track Racer
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Join Date: Sep 2021
Posts: 224 Sportster/Buell Model: XLH Sportster/Buell Year: 72 Sportster/Buell Model #2: XLCH Sportster/Buell Year #2: 71 Other Motorcycle Model: Five Harleys
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the mechanical regulators on old bikes sometimes let the voltage spike high enough to damage Li batteries. that is probably what he's talking about. electronic regulators work though
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23rd May 2023
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Land Speed Record
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Join Date: Jan 2019
Location: UK
Posts: 713 Sportster/Buell Model: XL1200T Sportster/Buell Year: 2017
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As I understand it with the Shorai batteries they do not contain a "complete" battery management system that ensures the cells are all at the same charge rate, balanced.
Shorai have their own balance charger that uses the small connector on the side of the battery.
So long as the regulator outputs a clean DC voltage around 14.6 volts that is all you can do on the bike.
Once a cell goes out of balance in a lithium battery due to effective internal resistance being different from the other cells it usually continues to discharge and charge at a different rate that causes it to fail.
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25th May 2023
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XL FORUM LIFE MEMBER
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Join Date: Oct 2018
Posts: 204 Sportster/Buell Model: Sportster Sportster/Buell Year: 1977
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Thanks for all the help guys.
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26th May 2023
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XL FORUM TEAM MEMBER
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Join Date: Oct 2008
Posts: 1,163 Sportster/Buell Model: Sportster Sportster/Buell Year: 1990 Sportster/Buell Model #2: Sportster Sportster/Buell Year #2: 1975 Other Motorcycle Model: Buell S1 W Other Motorcycle Year: 1998
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it's the cycle electric a "L" type?
__________________
1990 Sportster Axtell 90 ci, CP Carrillo 3.875 30° deg pistons,STD Heads, 615V2 RedShift cams, HSR48,
Carrillo 6.938 rods (All HammerPerf)
Hammer Billet Sledge air filter
Hammer Billet Manifold.
160/60ZR17 rear on Akront 5.50" Alu rim
100/90-19 front on Akront 2.50" new Alu rim
YSS 13.75 rear shocks
1975 XLH almost stock
1998 Buell S1W almost stock
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26th May 2023
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XL FORUM LIFE MEMBER
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Join Date: Oct 2018
Posts: 204 Sportster/Buell Model: Sportster Sportster/Buell Year: 1977
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No, the regular one -- Cycle Electric DGV-5000 12V Generator with Standard Regulator.
Mine is not a kick.
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