I've switched over to mottobat's on two of my bikes now. Very well made and a strong performance. I especially like the dual terminal fixing option and the use of Allen headed terminal fixings instead of the usual dumb semi-captive back nut that always falls out and drops down behind the engine never to be seen again. Another option is an Odyssey battery, fantastic but expensive. I have one fitted on my Jota, it's smaller then the original but has the power to spin the motor fast enough for instant starting. Its lasted 7 years so far, result!