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YTX9-BS

YTX9-BS battery: dimensions, polarity and equivalents

Dimensions, polarity, what the name means, similar battery codes and the battery that replaces it.

By Redacción de Satkit Updated Published on 3 min read 1 sources cited

In short

  • 12 V · 8 Ah · 135 A EN
  • 152 × 87 × 107 mm · positive terminal on the left
  • Satkit replacement: OUTDO UTX9-BS

The YTX9-BS is a 12 V maintenance-free AGM motorcycle battery with a capacity of 8 Ah, 135 A cold cranking amps (CCA, EN) and a case measuring 152 × 87 × 107 mm. It has the positive terminal on the left when viewed with the label facing you.

YTX9-BS dimensions: 152 × 87 × 107 mm, positive terminal on the leftLABEL+−152 mmLength107 mmHeight87 mmWidth
Fig. 01 YTX9-BS dimensions: 152 × 87 × 107 mm, positive terminal on the left Diagram: Satkit, drawn to scale using the dimensions in the product specifications

Dimensions and specifications

YTX9-BS OUTDO UTX9-BS
Voltage 12 V 12 V
Capacity 8 Ah (10 h) · 8.4 Ah (20 h) 9 Ah (10 h)
Cold cranking amps 135 A (EN) 135 A at −18 °C
Length × width × height 152 × 87 × 107 mm 150 × 87 × 105 mm
Polarity Positive terminal on the left Positive terminal on the left
Technology AGM AGM
Supplied With an acid bottle Activated and charged
Weight — 2.8 kg

The YTX9-BS column gives the specifications from Yuasa, the brand behind the battery code; the other column lists those of the battery sold by Satkit. Capacity is always compared at the same hourly rate, and starting current using the same standard.

What does YTX9-BS mean?

  • Y: Yuasa, which created the naming system. Other manufacturers change only this letter (GS uses GTX, Exide uses ETX and BS Battery uses BTX) while keeping the rest of the code.
  • TX: the maintenance-free AGM series.
  • 9: a size and power rating, not the amp-hours: the YTX9-BS has a capacity of 8 Ah at the 10-hour rate.
  • -BS: the original battery is supplied dry with an acid bottle (bottle supplied), so it must be filled before fitting.

Battery codes that are easy to mix up with the YTX9-BS

Battery code Dimensions Polarity Difference
YTZ12S 150 × 87 × 110 mm + left Same polarity and a similar case, but 3 mm taller: only suitable if you have that extra clearance (higher starting current: 210 A EN).
YTZ14S 150 × 87 × 110 mm + left Same polarity and a similar case, but 3 mm taller: only suitable if you have that extra clearance (higher starting current: 230 A EN).
YTX7A-BS 150 × 87 × 93 mm + left Different case: 14 mm shorter.
YTZ10S 150 × 87 × 93 mm + left Different case: 14 mm shorter.

Satkit battery for the YTX9-BS

OUTDO UTX9-BS: 12 V and 9 Ah, 135 A starting current, sealed AGM, factory-activated and factory-charged.

Yuasa's YTX9-BS is supplied with the acid bottle separately; Satkit's battery arrives activated and charged, so you can skip the filling and initial charging.

Motorcycles that use the YTX9-BS

97 versions by make and model

Kawasaki

Suzuki

See 69 more

Triumph

KTM

BMW

Royal Enfield

Kymco

Benelli

Husqvarna

SYM

Yamaha

Aprilia

Honda

Voge

Brixton

Fantic

Hyosung

Piaggio

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Charging and fitting

Find out more in our guide to choosing a motorcycle battery.

Satkit battery

OUTDO UTX9-BS, YTX9-BS motorcycle battery shown from the front with both terminals

OUTDO UTX9-BS

12 V, 9 Ah battery with 135 A cold cranking amps, a replacement for the YTX9-BS. Factory-activated and charged, ready to fit. Positive terminal on the left.

Where to buyfrom €24.35

Prices incl. VAT checked on 7 October 2026; they may change.

Sources

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