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KTM 450 SX-F Battery

2008–2027. KTM changed the 450 SX-F'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 450 SX-F

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OEM battery
ATZ5-XManufacturer fitment list
Case family
YTZ712V starter case
This battery fits
2026–2027other years take a different case

The KTM 450 SX-F takes the ATZ5-X case. The Antigravity ATZ-7 RE-START is a drop-in for that case: 150 cranking amps, 1.3 lb, a built-in jump start that saves enough charge to get you home.

See the Antigravity ATZ-7

450 SX-F battery by model year

2008–2010OEM batteryYTX5L-BS12V starter caseWhere it comes fromYuasa 2026 OEM guideLithium that fitsAntigravity ATZ-7 RE-START →
2011–2015OEM batteryYTX4L-BS12V starter caseWhere it comes fromYuasa 2026 OEM guideLithium that fitsAntigravity ATZ-7 RE-START →
2016–2017OEM batteryATZ5-X12V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity ATZ5-X →
2018–2022OEM batteryATZ5-X12V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity ATZ-7 RE-START →Antigravity ATZ5-X →
2023–2025OEM batteryATZ5-X12V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity ATZ5-X →
2026–2027Your year · 2027OEM batteryATZ5-X12V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity ATZ-7 RE-START →Antigravity ATZ5-X →

Trim covered: 450 SX-F.

Shop all KTM Dirt Bike batteries

Why the year matters on this one

The 450 SX-F is a dirt bike where the battery changed mid-run: 2008 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 ATZ-7 RE-START: 150 cranking amps, 1.3 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 KTM 450 SX-F take?+
It depends on the year: 2008 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 ATZ-7 RE-START, 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 450 SX-F 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.