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Fulbat FTX9-BS · Motorcycle battery 12V 8.4Ah 135A AGM

Specifications

BrandFULBAT
Part numberFTX9-BS
Voltage (V)12V
Capacity (C20)8.40Ah
Capacity (C10)8Ah (c10)
Cold cranking amps (EN)135A
TechnologyAGM
Length150mm
Width87mm
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Fulbat FTX9-BS 12V 8,4Ah 135A is a motorcycle starter battery with standard JIS code (the one on your bike's original label). Ready to use, sealed and vibration-resistant. Fits any model that takes the same JIS reference — the code your mechanic recognises at a glance.

Why this motorcycle battery?

  • Same JIS referenceas your bike's original — fits first time
  • Sealed and ready to useno acid handling, no refills
  • Survives winter storageholds charge through long off-season
Voltage
12 V
Capacity
8,4 Ah C20
Cold cranking
135 A EN-1
Dimensions
150×87×105 mm
Technology
AGM
Polarity
Positive on the left
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Motorcycle battery Fulbat FTX9-BS 8.4Ah 135A 12V

12VVoltage
8.4AhCapacity
135ACold cranking

The Fulbat FTX9-BS motorcycle battery is rated at 12 V, 8.4 Ah and 135 A of cold cranking current (EN), and is designed for motorcycles, scooters, quads and personal watercraft. It replaces the original battery without adaptation in motorcycles with a 150 × 87 × 105 mm format: same 8.4 Ah capacity and the positive terminal on the left.

In short: the Fulbat FTX9-BS (8 Ah, 135 A, 150 × 87 × 105 mm, positive left). Verified equivalent alternatives: Varta TTZ14S-BS and Varta YT12A-BS.

  • Resistant to the vibration typical of two wheels.
  • Energetic cranking for high-compression engines.
  • AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
  • Same JIS code as the original battery: fits first time.

What the Fulbat FTX9-BS is for

Designed for motorcycles, scooters, quads and personal watercraft, the Fulbat FTX9-BS replaces the original battery of bikes that use this code or format. Check the position of the positive terminal before ordering.

Technology inside the Fulbat FTX9-BS

The FTX9-BS is one of the Fulbat references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue.

In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery.

Will it fit your current battery tray?

In terms of format, the Fulbat FTX9-BS measures 150 × 87 × 105 mm (length × width × height). The positive terminal on the left decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

Fulbat: the maker behind the FTX9-BS

French brand Fulbat is a European reference in motorcycle, garden and leisure batteries: compact ranges, clear JIS codes and a consistent quality that workshops know well. We guarantee that every Fulbat arrives new, charged and with the manufacturer's full warranty.

How to make it last longer

If the bike spends the winter standing, connect a trickle charger: deep discharge through inactivity is the first cause of premature failure. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.

Warranty and coverage

The Fulbat FTX9-BS comes with the manufacturer's official warranty. The warranty does not cover discharge through prolonged inactivity: if the bike stands for months, use a trickle charger.

Shipping, delivery and returns

Orders placed before 6:00 pm with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic Islands and the rest of the European Union allow 3 to 5 working days. You have 14 days to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.

  • Reference
    BCOM-FULBAT-FTX9-BS

Data sheet

  • Brand
    FULBAT
  • Model
    FULBAT Motorcycle MF
  • Voltage (V)
    12V
  • Length
    150mm
  • Width
    87mm
  • Height
    105mm
  • Technology
    AGM
  • Terminal layout
    Positive left
  • Cold cranking amps (EN)
    135A
  • Capacity (C20)
    8.40Ah
  • Capacity (C10)
    8Ah (c10)

Specific References

  • MPN
    FTX9-BS

Comparison: Fulbat FTX9-BS vs equivalents — alternatives with the same dimensions, Ah and CCA

The Fulbat FTX9-BS is interchangeable with these equivalent references: 511902023 (Varta), 511901014 (Varta), 509901020 (Varta), TK091 (Tudor), EK091 (Exide).

Product Specifications Technology Price
Fulbat FTX9-BS Fulbat FTX9-BS This battery
Varta 511902023 Varta 511902023 ★ 5,0 12V 11Ah 230A AGM €47.30
Varta 511901014 Varta 511901014 ★ 5,0 12V 11Ah 160A AGM €43.20
Varta 509901020 Varta 509901020 12V 9Ah 200A AGM €88.70
Tudor TK091 Tudor TK091 12V 9Ah 120A AGM €61.70
Exide EK091 Exide EK091 12V 9Ah 120A AGM €55.40

Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.

Recommended accessories — complement the Fulbat FTX9-BS with a charger or tester

Frequently asked questions

How do I fit the FTX9-BS model in my motorcycle?

In most motorcycles it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on our blog. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On motorcycles with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

How long does the Fulbat FTX9-BS battery last?

Expected lifespan of the Fulbat FTX9-BS is 4 to 7 years in regular use (depends on technology and climate). In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.

What are the measurements of the FTX9-BS model?

Dimensions (length × width × height) are 150×87×105 mm — also written as 150x87x105 mm — following the European DIN standard. Always measure the space in your motorcycle before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

Will the Fulbat FTX9-BS battery fit my motorcycle?

Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The FTX9-BS typically fits a wide range of European vehicles thanks to its standard DIN case format.

What are the equivalents of the FTX9-BS model?

Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop motorcycles. See the "Equivalents" section to view recommended options at the same performance level.


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