Comment by tzs

One is what the battery is capable of given a favorable environment, the other is what you can get in the environment of that motorcycle?

If might be for example that in the motorcycle the battery or the other components that have to handle the charge current cannot dissipate heat fast enough to allow charging with the maximum current the batter allows. In an EV the pack shape probably has a higher surface area to volume ratio making it cool better, and an EV might also be able to actively cool it.