BMW R90S Battery
1969–1976. The OEM battery case the R90S takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.
1976 BMW R90S
- OEM battery
- YIX30L-BSYuasa 2026 OEM guide
- Case family
- YIX30L12V starter case
- Fits all years
- 1969–1976same case every year on file
The BMW R90S takes the YIX30L-BS case. The Antigravity ATX30 RE-START is a drop-in for that case: 880 cranking amps, 6 lb, a built-in jump start that saves enough charge to get you home.
See the Antigravity ATX30
R90S battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 1969–1976Your year · 1976 | OEM batteryYIX30L-BS12V starter case | Where it comes fromYuasa 2026 OEM guide | Lithium that fitsAntigravity ATX30 RE-START →Antigravity ATX30-HD →Ionic S7 → |
Trim covered: R90S.
Shop all BMW batteriesWhat the R90S needs, in plain English
Every R90S from the first 1969 model through 1976 starts on the YIX30L-BS case, a 12-volt starter battery. BMW 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 ATX30 RE-START: 880 cranking amps, 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.