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SUZUKI YT4B-BS AZ50 Lets II ZZ 50cc -02

 In Stock

Delivery to UK Mainland
Buy now for despatch
Tomorrow (Tuesday)

Part Number:  YT4B-BS

99.95 (inc VAT)


Yuasa motorcycle batteries are number one for good reason; the Yuasa YT4B-BS battery is a permanently sealed VRLA battery that never needs refilling - perfect for people who have better things to do than battery maintenance.

Brand:   Yuasa
Voltage:   12V
Capacity:   2.3AhHelpAmpHour or Ah measures the capacity of a battery.
In simple terms, the higher the Ah the more energy the battery can store.

If you imagine a bucket of water, the bigger the bucket, the more water it can store.

For example.
A 20Ah battery can normally deliver 1 Amp for 20 hours or 2 Amps for 10 hours. At extremes the performance usually drops, for example it may not deliver 20 Amps for one hour.

1Ah = 1000mAh
CCA (EN):   40A HelpCCA or Cold Cranking Amps, measures the starting performance of the battery.
In simple terms, the higher the CCA the easier it will start the engine.

There are several standards.

DIN German Industrial Standard at -18C
EN European Standard EN50342.1 at -18C
SAE American Standard at -18C
Weight:   1.1Kg
Length: 114mm
Width: 39mm
Height: 87mm


  • Spill-proof design to avoid any leakage
  • Advanced lead-calcium technology for improved starting power
  • Longer lasting design with reduced sulphation
  • Exceptional vibration resistance for the best reliability
  • Supplied with acid pack and installation instructions


  • Manufacturer: Yuasa
  • Battery Type Number: Yuasa YT4B-BS
  • Battery Type: Sealed 12V AGM maintenance-free battery
  • Filling Kit Included: Yes
  • Dimensions: 114mm x 39mm x 87mm
  • Capacity Rating: 2.3Ah
  • Cold-Start Performance CCA (EN): 40A
  • Maximum Charging Rate: 0.5 Amp
  • Weight (filled): 1.10kg
  • Terminal Layout: Left: + Right: - (With the terminals on the edge nearest to you)

Replaces The Following Part Numbers

  • Varta 503 902 004
  • 503-902-004

Fits The Following Motorbikes & Scooters

  • Yamaha TTR50E
  • Yamaha YJ50R Vino
  • Yamaha Vino Classic

CAUTION: Please be aware that if this battery is mounted on its side or at more than 30 degrees from vertical in your bike then you must leave it to stand in an upright position after you have filled it for at least 24 hours before you install it.

This YT4B-BS battery also fits the following SUZUKI models:
Model Model
UR50Velde 50cc -02 UF50
Tune 50 TR50 Street Magic 50cc -02
Sepia 50 AZ50 Lets II ZZ 50cc -02
AZ50 50cc 06 AZ50
AY50 W WR Katana 50cc -98 AJ50 ZZS 50cc -02

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  • 12v trickle charger
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  • 3 LED display
  • Croc clips

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