gremlin

Hello In the summer, my '14 1199 battery died so I replaced it with a Leoch YT7-B4 / YT7B-BS Sealed Gel battery. (Get a Shorai I hear you cry!). It worked fine for a couple of hoons. Anyway, 5 months later (of no riding) I go to ride the bike. It doesn't start and makes a clicking sound and...