The weight of lead-acid would make any motorcycle unwieldy unless the pack was only big enough to go 5 miles at 30mph or something but there really isn't much point to that IMHO, not much fun. I'd go with lithium, something like Headway would do well and the price would be reasonable.
It all depends on the goals of your conversion for range and at what speed and conditions you expect to have that range.
It all depends on the goals of your conversion for range and at what speed and conditions you expect to have that range.
