I was a little worried about the current rating Of the thundersky cells I was planning to get, I have heard they over play their specs, but here are some encouraging real world numbers from our Aussie EV forums, I asked about pulling 5C:
as far as doing it healthy, i would say so, rod dilkes pulls 450A out of his 90AH (also 5C) pretty regularly in his conversion. his pack is now a year old and going strong.
Most i have pulled out of my pack is 250A (just over 6C) and it sagged to 2vpc.
The thundersky batteries seem to be pretty consistent as far as volage sag goes, 0.2v per 1C of current.
so at 250A my pack sagged from 3.2v to 2v, at 70A it sags to 2.7v.
rob masons old 200AH packs in his mustang fall to 2.6vpc at 600A (3C).
the new 200AH pack in his triton ute fall to 1.7vpc at 1600A (8C)
Those are the packs i have seen in person.
Id doubt your bike would pull 300A continuous, at 60kmh, mine pulls 40[email protected] (i also have a yesa booster pack in series with the thunderskys in case you were wondering).