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YAMAHA YB4L-B Aero X R Max 50cc

 In Stock

Delivery to UK Mainland
Buy now for despatch
Today (Monday)

Part Number:  YB4L-B

19.95 (inc VAT)


Brand:   Yuasa
Voltage:   12V
Capacity:   4AhHelpAmpHour 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):   56A 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
Length: 120mm
Width: 70mm
Height: 92mm
Barcode: 4016987109342

RS250 battery Yuasa YB4L-B

YB4L-B 12v 4Ah Yuasa motorcycle / scooter battery. Genuine OE Original Yuasa product


  • Manufacturer: Yuasa
  • Battery type number: YB4L-B
  • Battery type: Dry charged battery
  • Filling kit included: Yes
  • Dimensions: 120mm x 70mm x 92mm
  • Capacity rating: 4Ah
  • Cold-start performance: 56EN
  • Maximum charging rate: 0.5 Amp
  • Weight (filled): 1.5Kg
  • Vent position: Right side (With the terminals on the edge nearest to you)
  • Terminal layout: Left: - Right: + (With the terminals on the edge nearest to you)

Replaces the following Part Numbers

  • Yuasa YB4L-B
  • Varta 504 011 002
  • 6I2P
  • AB4L-B
  • FB4L-B
  • CB4B-B
  • EB4B-B
  • 504-011-002
  • 514-011-002
  • YB4LB
  • YB4L-B

For a lithium iron upgrade please have a look at the Shorai batteries below.

This YB4L-B battery also fits the following YAMAHA models:
Model Model
Why 50cc 99 NEOS 50cc 98
CW50 Zuma 50cc 89-90 CW50 RS RSX BWs 50cc 91-97
CR50 Z 50cc 89-93 CE50 Riva Jog 50cc 86-87
BWs Bump Spy 50cc 99 BW 50 Spy
Aerox Neos Aero X R Max 50cc

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