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LithiumBatteryz

KTM 450 EXC-F Battery

2017–2019. The OEM battery case the 450 EXC-F takes and the lithium that drops into it, year by year. One case across the whole run.

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2019 KTM 450 EXC-F

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OEM battery
HJTZ5S-FPFactory manual
Case family
YTZ5S12V starter case
Fits all years
2017–2019same case every year

The KTM 450 EXC-F takes the HJTZ5S-FP 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
Antigravity ATZ5-X 12V Dirt Bike Battery 170CAStarterYTZ5S
Antigravity

Antigravity ATZ5-X 12V Dirt Bike Battery 170CA

12V·170CA·1 lb
$120
$160Save $40

450 EXC-F battery by model year

2017–2019Your year · 2019OEM batteryHJTZ5S-FP12V starter caseWhere it comes fromFactory manuala battery fitment list agreesLithium that fitsAntigravity ATZ5-X

Trim covered: 450 EXC-F Six Days.

Shop all KTM Dirt Bike batteries

What the 450 EXC-F needs

Every 450 EXC-F from the first 2017 model through 2019 starts on the HJTZ5S-FP case, a 12-volt starter battery. KTM 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 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 450 EXC-F take?+
The HJTZ5S-FP case, the same one on every 450 EXC-F from 2017 to 2019. The Antigravity ATZ5-X is the lithium drop-in for it.
Will a lithium battery work in a 450 EXC-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.