Secure On-Line Payments

Space at the bottom of the menu

Yuasa 51814 12V BMW Motorcycle Battery

Yuasa 51814 12V BMW Motorcycle Battery
Our Price:  £77.95(Inc. 20% VAT)(£64.96 Exc. VAT)


In stock, immediate despatch  

In stock, immediate despatch

Part Number:  51814
Voltage:  12v
Capacity:  18Ah
CCA Rating (EN):  100A
Length:  186mm
Width:  82mm
Height:  171mm

Yuasa Motorcycle Batteries

From July 1st 2018 under new EPP (Explosives, Precursors & Poisons) regulations, we can no longer supply sulphuric acid, so all "dry charged" Yuasa motorcycle batteries will be supplied without acid. You will have to get the battery filled locally.



  • Manufacturer: Yuasa
  • Battery type number: 51814
  • Battery type: Dry charged battery
  • Filling kit included: Yes
  • Dimensions: 186mm x 82mm x 171mm
  • Capacity rating: 19Ah
  • Cold-start performance: 100EN
  • Maximum charging rate: 2 Amp
  • Weight (filled): 5.6Kg
  • 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)

For a lithium iron upgrade please have a look at the Shorai LFX21L6-BS12 12V 21AH Cold-start performance: 315A CCA.

Replaces the following Part Numbers

  • 51814
  • 518-014-015
  • 6H4P
  • 51814
  • 52015
  • 520-015-018
  • 520-400-026

12v 19Ah battery fits the following Motorbikes

  • BMW R45 R50/5 R60/5
  • BMW R65 65 LS
  • BMW R75/5 R80
  • KTM XT600E 500SFC
  • and many more..

 To download the full Yuasa automotive range guide click icon

 To download the Yuasa MSDS safety sheet click icon


All prices include free mainland UK delivery - other than certain remote areas that may attract a delivery surcharge.

All Royal Mail deliveries are sent by first class post and are free to all UK postcodes.

Most UPS deliveries are free however remote areas may have a delivery surcharge; these are generally the Scottish Highlands and Islands, most off shore islands and a few other remote or inaccessible parts of the UK.

Certain products are unavailable for post/courier delivery due to restrictions on shipping hazardous substances; these will be available for collection only or in most instances can be shipped via specialist courier or pallet service at an additional charge.

If you have any delivery problems, require technical assistance or would simply like to speak to a human being then please call us.

For further delivery information click here


Does this battery come with the electrolyte acid pack?

No this battery is supplied dry as we cannot ship the acid separately under the new EPP Regulations so you will have to get the battery filled locally. If you are collecting from our warehouse, we can pre-fill the battery for you.

What are the EPP Regulations?

The EPP (Explosives, Precursors and Poisons) Regulations introduced on 1 July 2018 make it illegal to supply or ship sulphuric acid at more than 15% concentration to any member of the public - so all "dry charged" batteries now have to be shipped without acid.

View our blog post on the new regulations

Does this battery come charged?

They come with around 70% charge from the factory so once filled they can be fitted and used immediately as long as your bike is used on a regular basis. For bikes only used on an occasional basis we would suggest a full charge prior to install and on-going maintenance charging.