Yamaha R9 Battery

2025–2026. The OEM battery case the R9 takes and the lithium that drops into it, year by year. One case across the whole run. Also written YZF-R9.

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2026 Yamaha R9

Not yours?

OEM battery: YTZ7SYuasa 2026 OEM guide
Case family: YTZ7S12V starter case
Fits all years: 2025–2026same case every year

The Yamaha R9 takes the YTZ7S case. The Dakota Lithium 12V 4.5Ah is a drop-in for that case: 350 cranking amps, 1.5 lb.

See the Dakota Lithium 12V 4.5Ah

Fits your bike

4.5Ah

Starter

Dakota Lithium

Dakota Lithium 12V Motorcycle Battery 4.5Ah (350CCA)

12V·350CCA·1.5 lb

$119

3-yr warranty · Ships in 3-5 days

Also fits your bike · 1 more

150CA

StarterYTZ7

Antigravity

Antigravity ATZ-7 12V Motorcycle Battery 150CA (w/ Re-Start)

3-yr warranty · Ships in 3-5 days

R9 battery by model year

Model years	OEM battery	Where it comes from	Lithium that fits
2025–2026Your year · 2026	OEM batteryYTZ7S12V starter case	Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees	Lithium that fitsDakota Lithium 12V 4.5Ah Antigravity ATZ-7 RE-START

Trim covered: YZF-R9.

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What the R9 needs

Every R9 from the first 2025 model through 2026 starts on the YTZ7S case, a 12-volt starter battery. Yamaha 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 Dakota Lithium 12V 4.5Ah: 350 cranking amps, 1.5 pounds, the same case in lithium. 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 Yamaha R9 take?+

The YTZ7S case, the same one on every R9 from 2025 to 2026. The Dakota Lithium 12V 4.5Ah is the lithium drop-in for it.

Will a lithium battery work in an R9 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.