Harley-Davidson Road King Battery

1994–2025. Harley-Davidson changed the Road King's battery once across the run. Pick your year and we show the case that year takes and the lithium that fits it. Change any box in the strip to look up another bike.

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2025 Harley-Davidson Road King

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OEM battery: YIX30L-BSYuasa 2026 OEM guide
Case family: YIX30L12V starter case
This battery fits: 1998–2025other years take a different case

The Harley-Davidson Road King takes the YIX30L-BS case. The Antigravity ATX30 RE-START is a drop-in for that case: 880 cranking amps, 6 lb, a built-in jump start that saves enough charge to get you home.

See the Antigravity ATX30

Fits your bike

880CA

Starter

Antigravity

Antigravity ATX30 12V Motorcycle Battery 880CA (w/ Re-Start)

3-yr warranty · Free Shipping

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48Ah

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1220CA

Starter

Ionic

Ionic Lithium S7 12V ATV Starter Battery (1220CA)

12V·1220CA·8.9 lb

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5-yr warranty · Free Shipping

Road King battery by model year

Model years	OEM battery	Where it comes from	Lithium that fits
1994–1996	OEM batteryYTX24HL12V starter case	Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees	Lithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD →Ionic S6 →
1998–2025Your year · 2025	OEM batteryYIX30L-BS12V starter case	Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees	Lithium that fitsAntigravity ATX30 RE-START →Antigravity ATX30-HD →Ionic S7 →

14 trims covered: CVO Road King FLHRSE, Road King CVO/SE FLHRSE3, Road King CVO/SE FLHRSE4, Road King CVO/SE FLHRSE5, Road King CVO/SE FLHRSE6, Road King CVO/SE FLHRSEI, Road King CVO/SE FLHRSEI2, Road King Classic FLHRC (ABS), Road King Classic FLHRC/I, Road King Custom FLHRS/I and 4 more.

Shop all Harley-Davidson batteries

Why the year matters on this one

The Road King is a motorcycle where the battery changed mid-run: 1994 to 1996 takes the YTX24HL and 1998 to 2025 the YIX30L-BS. The plate above names the source for each year, and the table shows every run we have on file, so match the year to the case before you order.

For 1998 to 2025 that means the Antigravity ATX30 RE-START: 880 cranking amps, 6 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 Road King take?+

It depends on the year: 1994 to 1996 takes the YTX24HL and 1998 to 2025 the YIX30L-BS. For 1998 to 2025 that is the Antigravity ATX30 RE-START, the lithium drop-in for the YIX30L-BS case. The table above shows every run we have on file, so match your year to the case before you order.

Will a lithium battery work in a Road King 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.