Read up on cold starts using LiFePO4 batteries, the type everyone buy shorai uses. It's not a straight up, press button ride motorcycle procedure. There is some level of push button, wait, push button wait, push button, wait until the internal chemistry is warmed up before it'll actually fire the bike over.
On ballisitics website they show it using a 103 hardley, that procedure is considered "normal behavior" and not a basis for warranty. If you can live with it, they're great, if you want "push button, ride bike", go with an AGM.