Yamaha YFZ450X Battery

2008–2011. Yamaha changed the YFZ450X'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 machine.

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2011 Yamaha YFZ450X

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OEM battery: YTX5L-BSYuasa 2026 OEM guide
Case family: YTZ712V starter case
This battery fits: 2010–2011other years take a different case

The Yamaha YFZ450X takes the YTX5L-BS 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. Some trims of this model take a different battery; check the code on yours.

See the Antigravity ATZ-7

Fits your machine

150CA

StarterYTZ7

Antigravity

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

3-yr warranty · Ships in 3-5 days

YFZ450X battery by model year

Model years	OEM battery	Where it comes from	Lithium that fits
2008	OEM batteryYT7B-BS12V starter case	Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees	Lithium that fitsAntigravity AT7B-BS RE-START →
2010–2011Your year · 2011	OEM batteryYTX5L-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.

2 trims covered: YFZ450X, YFZ450X SE.

Shop all Yamaha ATV batteries

Why the year matters on this one

The YFZ450X is an ATV where the battery changed mid-run: 2008 takes the YT7B-BS and 2010 to 2011 the YTX5L-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 2010 to 2011 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. Some trims of this model take a different battery; check the code on yours. 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 YFZ450X take?+

It depends on the year: 2008 takes the YT7B-BS and 2010 to 2011 the YTX5L-BS. For 2010 to 2011 that is the Antigravity ATZ-7 RE-START, the lithium drop-in for the YTX5L-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 YFZ450X without changes?+

Yes, on a machine 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. Check that the stator and regulator hold a steady charge, fill any gap in the tray with the foam spacers most lithium ATV batteries include, and match the terminal layout of the battery you are replacing.

Do I need a different charger for a lithium ATV 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.