Yuasa YTX7L-BS 12V 6 Ah
(4 reviews)
The small battery fitted to half the 125s and scooters on European roads: tall and narrow, 100 cranking amps, and the seriousness of an original-equipment maker.
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Characteristics
- Capacity: 12 V, 6 Ah (100 cranking amps)
- Technology: Sealed AGM, pre-activated, maintenance free
- Format: 115 x 72 x 132 mm, 2.5 kg
- Polarity: Positive terminal on the right
- The reference for 125s and city scooters
Detailed overview: Yuasa YTX7L-BS AGM motorcycle battery 100 A
The Yuasa YTX7L-BS is a 12 volt starter battery for small-capacity machines: 125 cc motorcycles, scooters, entry-level quads and compact jet skis. It offers 6 amp-hours of capacity and 100 cranking amps in a 115 x 72 x 132 mm case weighing 2.5 kilos, with the positive terminal on the right.
Its format is what defines it above all. Tall and narrow, it does not substitute for a YTX9-BS or a YTX7A-BS, both close in capacity but shaped differently. The YTX7L-BS designation is an industry-standard reference fixing dimensions, polarity and performance at once: if your machine had one from new, replacement is direct.
The technology is sealed AGM, also called VRLA. The electrolyte is held in a glass-fibre separator rather than floating free: no topping up is needed, the battery copes well with the vibration of a single-cylinder engine, and it will not leak if tilted. It is the standard on modern two-wheelers.
The version distributed in Europe is factory-activated: unlike other references in the range supplied dry with an acid bottle, this one comes ready to fit. A top-up charge before first use is still advisable, especially if the battery has sat in stock for several months.
For a larger engine, the Yuasa YTX9-BS is the one to look at. And since a two-wheeler is ridden little and recharges poorly, plan on a trickle charger: the Einhell CE-BC 4 M and the Bosch C30 both handle 6 and 12 volts and suit small capacities.
EAN: 5050694004445
User manual / Instructions for use
Comparison
The reference is dictated by the bike's battery compartment: the table mainly helps you avoid the wrong format.
| Criterion | Yuasa YTX7L-BS | Yuasa YTX9-BS | Yuasa YTX14-BS | Generic equivalent |
|---|---|---|---|---|
| Capacity | 6 Ah | 8.4 Ah | 12 Ah | Variable |
| Cold cranking | 100 A | 135 A | 200 A | Often overstated |
| Dimensions | 115 x 72 x 132 mm | 150 x 87 x 105 mm | 150 x 87 x 145 mm | By reference |
| Typical use | 125s, city scooters | 600 cc road bikes, maxi-scooters | Cruisers, big capacity | All |
| Observed price | ≈ 66 € | ≈ 73 € | ≈ 67 € | ≈ 25 to 35 € |
Note that the YTX7L-BS often costs about as much as the larger YTX9-BS despite being smaller: it sells in lower volumes, which explains the gap. That leaves no real choice anyway, since the two formats are not interchangeable. Against thirty-euro generic equivalents the reasoning stays the same as across the range: the reference and dimensions match, the durability does not.
Our tester's review: Gilles Caron
On a 125 or a scooter, the battery sits in a compartment sized to the millimetre, often under the seat or behind a side panel. The YTX7L-BS answers that exact format: it is tall and narrow where the YTX9-BS is low and wide, and the two are not interchangeable despite similar capacities. That is the first thing to check before ordering, and the reason this standardised reference exists at all. On substance you get the qualities that made Yuasa's name: it is the maker supplying a good share of Japanese manufacturers as original equipment, and its plates go the distance where thirty-euro compatibles lose capacity by their second season. The 100 cranking amps are ample for a 125 cc single, cold mornings included, provided the battery is charged. One practical detail sets it apart from the rest of the range: in the version we selected it ships factory-activated, with no acid bottle to pour. Out of the box, connected, ridden. That is welcome on a two-wheeler where reaching the battery often means removing bodywork. Two reservations that are barely reservations. Six amp-hours is little: on a scooter fitted with an alarm or heated grips, the reserve drains fast if journeys are short. And like every small-capacity battery, it hates being laid up unattended. A trickle charger connected from November to March costs a third of a new battery and buys it two extra years.
Frequently asked questions: Yuasa YTX7L-BS AGM motorcycle battery 100 A
No. Despite similar capacities the formats differ: the YTX7L-BS measures 115 x 72 x 132 mm, the YTX9-BS 150 x 87 x 105 mm. It will not fit the compartment, and the terminals are not on the same side either.
The version distributed in Europe is factory-activated, so there is no acid bottle to pour. A top-up charge before first use is still advisable, particularly if the battery has spent several months in the retailer's stock.
Six amp-hours leave little reserve. An alarm, a tracker or heated grips draw current constantly, and on short journeys the alternator does not make up for it. In that case a trickle charger becomes essential rather than optional.
Three to four years in regular use. The decisive factor is not mileage but winter lay-up: a small-capacity battery left flat for four months sulphates and permanently loses part of its capacity.
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Europe's most widely fitted reference on mid-capacity motorcycles and maxi-scooters: sealed AGM, 135 cranking amps, and the reliability of a century-old maker.
Published on 26/07/2026