Honda NX650 Battery

1988–1989. The OEM battery case the NX650 takes and the lithium that drops into it, year by year. One case across the whole run.

Your Ride

Change any box to look up another bike.

Your ride

1989 Honda NX650

Not yours?

OEM battery: YTX9-BSYuasa 2026 OEM guide
Case family: YTX912V starter case
Fits all years: 1988–1989same case every year

The Honda NX650 takes the YTX9-BS case. The Ionic S4 is a drop-in for that case: 500 cranking amps, 3.3 lb.

Fits your bike

Ionic Lithium S4 12V Motorcycle Battery 500CA (Bluetooth)

5-yr warranty · Ships in 3-5 days

Also fits your bike · 2 more

360CA

StarterYTZ10

Antigravity

Antigravity ATZ-10 12V Dirt Bike Battery 360CA (w/ Re-Start)

3-yr warranty · Free Shipping

525CA

StarterYTZ10

Antigravity

Antigravity ATZ-10-HD 12V Motorcycle Battery 525CA (w/ Re-Start)

3-yr warranty · Free Shipping

NX650 battery by model year

Model years	OEM battery	Where it comes from	Lithium that fits
1988–1989Your year · 1989	OEM batteryYTX9-BS12V starter case	Where it comes fromYuasa 2026 OEM guide	Lithium that fitsIonic S4 Antigravity ATZ-10 RE-START Antigravity ATZ-10-HD RE-START

Trim covered: NX650.

Shop all Honda Dirt Bike batteries

What the NX650 needs

Every NX650 from the first 1988 model through 1989 starts on the YTX9-BS case, a 12-volt starter battery. Honda 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 Ionic S4: 500 cranking amps, 3.3 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 Honda NX650 take?+

The YTX9-BS case, the same one on every NX650 from 1988 to 1989. The Ionic S4 is the lithium drop-in for it.

Will a lithium battery work in an NX650 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.