Thanks for the info.

Also noticed Hitchcocks have a special offer on normal Lead Acid batteries (no acid supplied) that suit the Arrow/Leader:
http://accessories.hitchcocksmotorcycle ... ical/34578

My battery recently died so I've taken a chance on a JMT 6N11A-1B Gel battery. Has anyone else tried one? It has no breather vent on it. It's on charge at the moment, but comparing to the previous YUASA standard acid battery it has the same dimensions. Cost was about £28. Also not sure if of interet...