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CzeV404 is an SU UMa-type dwarf nova in the period gap. Kara et al. (2021)(arXiv:2107.02664) recently published photometric and spectroscopicobservations and obtained a mass ratio q=0.16, which is in severe disagreementof q~0.32 estimated from superhump observations (Bakowska et al., 2014). I herepresent what analysis was wrong or outdated in Bakowska et al. (2014) andprovide a new value of q=0.247(5), consistent with the known behavior ofsuperhumps and the evolution of cataclysmic variables. CzeV404 does not looklike an unusual dwarf nova as suggested by Kara et al. (2021) and I discussthat the link between SW Sex and SU UMa systems suggested by Kara et al. (2021)is not supported.

On the superhumps and mass ratio of CzeV404