Yuasa Yumicron YB16-B-CX, 12v 19Ah Motorcycle Batteries. L(mm) W(mm) H(mm) 172 96 154. Replacement battery for Harley Davidson 65991-75C. Replaces the following part numbers: 65991-75C, FB16-B, 6B4P, AB16-B, EB16-B, CB16-B, 519 012 019. 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