KTM 250 Battery

2007–2027. KTM changed the 250's battery twice 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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2027 KTM 250

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OEM battery: ATZ5-XManufacturer fitment list
Case family: ATZ5-X12V starter case
This battery fits: 2023–2027other years take a different case

The KTM 250 takes the ATZ5-X case. The Antigravity ATZ5-X is a drop-in for that case: 170 cranking amps, 1 lb.

See the Antigravity ATZ5-X

Fits your bike

170CA

Starter

Antigravity

Antigravity ATZ5-X 12V Dirt Bike Battery 170CA

12V·170CA·1 lb

$120

$160Save $40

3-yr warranty · Ships in 3-5 days

250 battery by model year

Model years	OEM battery	Where it comes from	Lithium that fits
2007–2010	OEM batteryYTX5L-BS12V starter case	Where it comes fromYuasa 2026 OEM guide	Lithium that fitsAntigravity ATZ-7 RE-START →
2011–2015	OEM batteryYTX4L-BS12V starter case	Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees	Lithium that fitsAntigravity ATZ-7 RE-START →Some trims of this model take a different battery; check the code on yours.
2016–2017	OEM batteryATZ5-X12V starter case	Where it comes fromManufacturer fitment list	Lithium that fitsAntigravity ATZ5-X →
2018–2022	OEM batteryATZ5-X12V starter case	Where it comes fromManufacturer fitment list	Lithium that fitsAntigravity ATZ-7 RE-START →Antigravity ATZ5-X →Some trims of this model take a different battery; check the code on yours.
2023–2027Your year · 2027	OEM batteryATZ5-X12V starter case	Where it comes fromManufacturer fitment list	Lithium that fitsAntigravity ATZ5-X →

2 trims covered: 250 SX, 250 XC.

Shop all KTM Dirt Bike batteries

Why the year matters on this one

The 250 is a dirt bike where the battery changed mid-run: 2007 to 2010 takes the YTX5L-BS, 2011 to 2015 the YTX4L-BS and 2016 to 2027 the ATZ5-X. 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 2016 to 2027 that means the Antigravity ATZ5-X: 170 cranking amps, 1 pound, 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 KTM 250 take?+

It depends on the year: 2007 to 2010 takes the YTX5L-BS, 2011 to 2015 the YTX4L-BS and 2016 to 2027 the ATZ5-X. For 2016 to 2027 that is the Antigravity ATZ5-X, the lithium drop-in for the ATZ5-X 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 250 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 dirt bike batteries include.

Do I need a different charger for a lithium dirt bike 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.