Yuasa YB14L-A2, 12v 14Ah Motorcycle Batteries. Also replaces 12N13-3A and 6Y4PS L(mm) W(mm) H(mm) 134 89 166. Note: Before use this battery requires filling with sulphuric acid. The acid is not supplied with it because it is classed as hazardous material and it will not be accepted for carriage by our delivery agents. You should however be able to obtain suitable acid at any good local motor spares distributor.