Honda Trx 125 Battery
1985–1988. Honda changed the Trx 125'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.
1988 Honda Trx 125
- OEM battery
- YTX9-BSYuasa 2026 OEM guide
- Case family
- YTZ1012V starter case
- This battery fits
- 1987–1988other years take a different case
The Honda Trx 125 takes the YTX9-BS case. The Antigravity ATZ-10 RE-START is a drop-in for that case: 360 cranking amps, 2.6 lb, a built-in jump start that saves enough charge to get you home.
See the Antigravity ATZ-10
Trx 125 battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 1985–1986 | OEM batteryYB9A-A12V starter case | Where it comes fromYuasa 2026 OEM guide | Lithium that fitsNot stocked yet (needs a YB9A-A-case lithium). Call us and we will point you at the right battery. |
| 1987–1988Your year · 1988 | OEM batteryYTX9-BS12V starter case | Where it comes fromYuasa 2026 OEM guide | Lithium that fitsAntigravity ATZ-10 RE-START →Antigravity ATZ-10-HD RE-START →Ionic S4 → |
Trim covered: Trx 125 Fourtrax.
Shop all Honda ATV batteriesWhy the year matters on this one
The Trx 125 is an ATV where the battery changed mid-run: 1985 to 1986 takes the YB9A-A and 1987 to 1988 the YTX9-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 1987 to 1988 that means the Antigravity ATZ-10 RE-START: 360 cranking amps, 2.6 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.