Quark 125b post thermal behavior

[glassdoctor]

16/51 with a 2200kv is overgeared for all but speed runs imo.

I don't gear that tall even with my 1700kv 1515.... I think I would be running about a 12T pinion with your setup.

Still... maybe you have an esc issue, like the fets not getting good contact with the case.