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Harley-Davidson Sturgis FXB Battery

1980–1982. The OEM battery case the Sturgis FXB takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.

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1982 Harley-Davidson Sturgis FXB

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OEM battery
YTX20-BSYuasa 2026 OEM guide
Case family
YTX2012V starter case
Fits all years
1980–1982same case every year on file

The Harley-Davidson Sturgis FXB takes the YTX20-BS case. The Antigravity ATX20 RE-START is a drop-in for that case: 680 cranking amps, 4 lb, a built-in jump start that saves enough charge to get you home.

See the Antigravity ATX20

Sturgis FXB battery by model year

1980–1982Your year · 1982OEM batteryYTX20-BS12V starter caseWhere it comes fromYuasa 2026 OEM guideAntigravity fitment list agreesLithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD →Ionic S6 →

Trim covered: Sturgis FXB.

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What the Sturgis FXB needs, in plain English

Every Sturgis FXB from the first 1980 model through 1982 starts on the YTX20-BS case, a 12-volt starter battery. Harley-Davidson ships it with a lead-acid battery that starts to fade after two or three seasons of short rides and off-season storage, and that is usually the day a rider goes looking for something better.

The lithium drop-in is the Antigravity ATX20 RE-START: 680 cranking amps, 4 pounds, the same case in lithium. Its RE-START function puts the battery to sleep before a parasitic draw can drain it, then wakes it with one press for a jump start. Charge it with a lithium-compatible charger or maintainer for the off-season and it outlasts the lead-acid battery it replaces by years.

What size battery does a Harley-Davidson Sturgis FXB take?+
The YTX20-BS case, the same one on every Sturgis FXB from 1980 to 1982. The Antigravity ATX20 RE-START is the lithium drop-in for it.
Will a lithium battery work in a Sturgis FXB without changes?+
Yes, on a bike with a healthy charging system: the lithium battery uses the same case, the same posts and the same cables, and it drops in where the lead-acid battery sat. Bikes older than about 2000 should have their voltage regulator and rectifier checked first, since a failing one overcharges any battery and lithium tolerates it less. Fill any gap in the tray with the foam spacers most lithium motorcycle batteries include.
Do I need a different charger for a lithium motorcycle battery?+
Use a charger or maintainer with a lithium (LiFePO4) mode. A lead-acid trickle charger can push the wrong voltage profile, and a desulfation mode can damage a lithium pack. A lithium-profile maintainer over the off-season keeps it topped without harm, and the battery loses only a few percent of charge a month sitting on its own.