I had issues with mine a little while ago. Mac was most helpful posting his starting technique, but it only worked a couple of times then back to square one. Anyway, now solved, and a long story short but... When I bought the bike just over a year ago the battery was clapped out. I replaced it with ...
It's a feggin awful job clearing that out, but it's done now. Looks like there's some electrolysis going on in the bottom, there are a series of small holes although the surrounding steel is solid. I've ordered some stainless steel plates, then going to recover the bottom of the tank with them ...
I use mine for commuting. Not ideal... to small a tank range, thirsty, a bit lumpy in traffic, can be a bit too torquey on tight, greasy roundabouts when negotiating dozy car drivers. Had a GPZ600 a few Years ago for commuting... economical, easy to ride, enough power... but boring as hell. I can't ...