Triumph Speedmaster 865 Battery
2007–2016. Triumph changed the Speedmaster 865'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 bike.
2016 Triumph Speedmaster 865
- OEM battery
- YTX12-BSYuasa 2026 OEM guide
- Case family
- YTX1212V starter case
- This battery fits
- 2016other years take a different case
The Triumph Speedmaster 865 takes the YTX12-BS case. The Antigravity ATX12 RE-START is a drop-in for that case: 360 cranking amps, 3 lb, a built-in jump start that saves enough charge to get you home.
See the Antigravity ATX12
Speedmaster 865 battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 2007–2015 | OEM batteryYT12B-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity AT12BS RE-START → |
| 2016Your year · 2016 | OEM batteryYTX12-BS12V starter case | Where it comes fromYuasa 2026 OEM guide | Lithium that fitsAntigravity ATX12 RE-START →Antigravity ATX12-HD RE-START →Ionic S4 → |
Trim covered: Speedmaster 865.
Shop all Triumph batteriesWhy the year matters on this one
The Speedmaster 865 is a motorcycle where the battery changed mid-run: 2007 to 2015 takes the YT12B-BS and 2016 the YTX12-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 2016 that means the Antigravity ATX12 RE-START: 360 cranking amps, 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.