# Varta YTX9-BS · Motorcycle battery 12V 8Ah 135A

![Varta YTX9-BS · Motorcycle battery 12V 8Ah 135A](https://bateriasonline.es/1192-home_default/varta-ytx9-bs-508012014.jpg)

> Varta YTX9-BS (ETN 508012014): 8 Ah motorcycle battery, 135 A (EN), 152×88×106 mm, positive terminal on the left.

**Category:** [Motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries) → [Varta](https://bateriasonline.es/en/varta-batteries)

- **Canonical URL**: https://bateriasonline.es/en/varta-ytx9-bs-508012014
- **Language**: en
- **Brand**: Varta
- **Reference**: BOL-VARTA-508012014
- **EAN**: 4016987169056
- **MPN**: 508012014
- **Price**: 29,40 € (VAT incl., Spain)
- **Last updated**: 2026-11-09

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Varta |
| Range | VARTA PowerSports AGM |
| Application | Motorcycles |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 8 Ah |
| Cold cranking amps (EN) | 135 A |
| Length | 152 mm |
| Width | 88 mm |
| Height | 106 mm |
| Weight | 3.04 kg |
| Polarity | Positive terminal on the left |
| Terminal type | Y5 |
| ETN code | 508012014 |
| JIS code | YTX9-4 YTX9-BS |

## Quick description

Varta YTX9-BS (ETN 508 012 014, also written 508012014): motorcycle battery (AGM) with 12 V, 8 Ah and 135 A cold cranking current, measuring 152 × 88 × 106 mm, with the positive terminal on the left.

## Description

## Who the Varta YTX9-BS is for

The Varta YTX9-BS is a motorcycle starter battery: compact, vibration-resistant and with just the right power to turn the starter motor and feed the electronics. It is worth keeping the YTX9-BS on a maintenance charger if the bike is laid up over winter.
At 8 Ah it covers mid-capacity motorcycles, large scooters and light quads. Varta lists the YTX9-BS in its Powersports AGM line. [See all Varta batteries](https://bateriasonline.es/en/varta-batteries)

## Part numbers and codes for the Varta YTX9-BS

The YTX9-BS is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | YTX9-BS |
|---|---|
| ETN code | 508012014 (also 508 012 014) |
| Manufacturer short code | TX9-4/TX9-BS |
| EAN | 4016987169056 |
| Case size according to Varta | TX9-BS (TX9-4) |
| Base hold-down | B00 |
| Terminal type | Y5 |
| Also known as | Varta 508012014 · Varta 508 012 014 · Varta TX9-4 · Varta TX9-BS |

## Equivalents and alternatives to the Varta YTX9-BS

Other AGM batteries that fit the YTX9-BS's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Fulbat FTX9-BS | AGM | 8.4 Ah | 135 A | 150 × 87 × 105 |
| Varta YTX9 (FA) | AGM | 8 Ah | 135 A | 151 × 87 × 106 |
| Exide ET12A-BS | AGM | 10 Ah | 130 A | 150 × 90 × 105 |
| Motobatt MBTX9U | AGM | 10.5 Ah | 160 A | 151 × 87 × 105 |
| Varta T12A (FA) | AGM | 10 Ah | 145 A | 150 × 88 × 105 |
| Varta YT12A-BS | AGM | 11 Ah | 160 A | 150 × 88 × 105 |

## Varta YTX9-BS vs TTZ12S-BS, TTZ10S-BS and TZ10S (FA)

The real differences between the YTX9-BS and the closest Varta models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Varta YTX9-BS (this one) | 8 Ah | 135 A | 152 × 88 × 106 | left | 3.04 kg |
| Varta TTZ12S-BS | 9 Ah | 200 A | 150 × 87 × 110 | left | 3.8 kg |
| Varta TTZ10S-BS | 8 Ah | 150 A | 150 × 87 × 93 | left | 3.11 kg |
| Varta TZ10S (FA) | 9 Ah | 150 A | 150 × 87 × 93 | left | 3.15 kg |
| Varta T12A (FA) | 10 Ah | 145 A | 150 × 88 × 105 | left | 3.29 kg |

- Varta TTZ12S-BS: 1 Ah more, 65 A more cranking power, a different case (150 × 87 × 110 mm).
- Varta TTZ10S-BS: the same capacity, 15 A more cranking power, a different height (93 mm instead of 106 mm). It is the option if your battery tray cannot take the 106 mm height of the YTX9-BS.
- Varta TZ10S (FA): 1 Ah more, 15 A more cranking power, a different height (93 mm instead of 106 mm). It is the option if your battery tray cannot take the 106 mm height of the YTX9-BS.
- Varta T12A (FA): 2 Ah more, 10 A more cranking power, the same dimensions.

## What to look at before buying the YTX9-BS

- Length, width and height of the YTX9-BS: 152 × 88 × 106 mm.
- Polarity of the YTX9-BS: positive terminal on the left (if yours has it on the other side, the cables will not reach).
- Your current battery should say about 8 Ah; a little more is also fine.
- Check the EN amps on your battery: if it says 135 A or less, the YTX9-BS covers your engine.

## Frequently asked questions about the Varta YTX9-BS

### YTX9-BS or TTZ12S-BS: which one suits me?

Compared with the YTX9-BS, the Varta TTZ12S-BS has 1 Ah more and 65 A more cranking power. If your current battery says 200 A or more, choose the TTZ12S-BS; if it says 135 A or less, the YTX9-BS is enough. Mind the space: the TTZ12S-BS measures 150 × 87 × 110 mm.

### Varta YTX9-BS or TTZ10S-BS/TZ10S (FA): what changes?

Mainly the height: the YTX9-BS is 106 mm tall and the Varta TTZ10S-BS 93 mm, with the same length and width. In capacity and cranking power, the TTZ10S-BS offers 8 Ah and 150 A against 8 Ah and 135 A. The Varta TZ10S (FA) is 93 mm tall, with 9 Ah and 150 A. Before choosing between the YTX9-BS and the TTZ10S-BS, measure the free height of the battery compartment with the cover or bonnet closed.

### Is the Varta 508012014 the same battery as the Varta YTX9-BS?

Yes. 508012014 is the ETN code Varta uses for its YTX9-BS battery, so you can search for it by either code.

### How much does the Varta YTX9-BS weigh?

3.04 kg, with 8 Ah of capacity. For reference, the Varta TTZ12S-BS (9 Ah) weighs 3.8 kg.

### Which battery is equivalent to the Varta YTX9-BS?

Only other AGM batteries with its dimensions and polarity: Fulbat FTX9-BS, Varta YTX9 (FA) and Exide ET12A-BS. Neither an EFB nor a conventional battery replaces the YTX9-BS.

### Which side is the positive terminal on the Varta YTX9-BS?

On the YTX9-BS, the positive terminal is on the left with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

## Inside the YTX9-BS: AGM technology

The YTX9-BS is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. It withstands many more cycles than a conventional lead battery, at the cost of being more sensitive to overcharging.

## More batteries to compare with the YTX9-BS

- [Other motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [Full Varta catalogue](https://bateriasonline.es/en/varta-batteries)
- [Fulbat FTX9-BS](https://bateriasonline.es/en/fulbat-ftx9-bs) · 8.4 Ah, 135 A, 150×87×105 mm
- [Varta YTX9 (FA)](https://bateriasonline.es/en/varta-ytx9-fa-508909014) · 8 Ah, 135 A, 151×87×106 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-11*