MOTOBATT Hi Tech battery. No more filling of acid or water. Very powerful. Comes charged. A very long life is possible, but never fully discharge it, don't let it get under 12,2Volts
Fits BSA A50/65 1964 up
Triumph 500/650/750 1964 up, also electric start.
Norton twins 12Volts
Size 135 mm x 73mm x 135mm. Spacer for replacement of taller models is included. Replaces 12N9-4B-1 and YB12-AA