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LithiumBatteryz

BMW R80ST Battery

1979–1986. BMW changed the R80ST'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.

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1979 BMW R80ST

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OEM battery
YIX30L-BSYuasa 2026 OEM guide
Case family
YIX30L12V starter case
This battery fits
1979other years take a different case

The BMW R80ST 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

R80ST battery by model year

1979Your year · 1979OEM batteryYIX30L-BS12V starter caseWhere it comes fromYuasa 2026 OEM guideLithium that fitsAntigravity ATX30 RE-START →Antigravity ATX30-HD →Ionic S7 →
1980–1986OEM batteryYT19BL-BS12V starter caseWhere it comes fromYuasa 2026 OEM guideLithium that fitsNot stocked yet (needs a YT19BL-case lithium). Call us and we will point you at the right battery.

Trim covered: R80ST.

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Why the year matters on this one

The R80ST is a motorcycle where the battery changed mid-run: 1979 takes the YIX30L-BS and 1980 to 1986 the YT19BL-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 1979 that means 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.

What size battery does a BMW R80ST take?+
It depends on the year: 1979 takes the YIX30L-BS and 1980 to 1986 the YT19BL-BS. For 1979 that is the Antigravity ATX30 RE-START, the lithium drop-in for the YIX30L-BS case. The table above shows every run we have on file, so match your year to the case before you order.
Will a lithium battery work in an R80ST 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 motorcycle batteries include.
Do I need a different charger for a lithium motorcycle 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.