Triumph Speedmaster 800 Battery
2003–2006. The OEM battery case the Speedmaster 800 takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.
2006 Triumph Speedmaster 800
- OEM battery
- YT12B-BSYuasa 2026 OEM guide
- Case family
- YT12B12V starter case
- Fits all years
- 2003–2006same case every year on file
The Triumph Speedmaster 800 takes the YT12B-BS case. The Antigravity AT12BS 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 AT12BS
Speedmaster 800 battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 2003–2006Your year · 2006 | OEM batteryYT12B-BS12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity AT12BS RE-START → |
Trim covered: Speedmaster 800.
Shop all Triumph batteriesWhat the Speedmaster 800 needs, in plain English
Every Speedmaster 800 from the first 2003 model through 2006 starts on the YT12B-BS case, a 12-volt starter battery. Triumph 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 AT12BS 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.