100%, the existing ones don't look particularly bulky or heavy. On a lightweight bass 75g weight saving on the headstock might make enough difference though. Guyker do some open gear tuners they are 69g and work out at about £40 for a 5 string set, probably cheaper on AliExpress.
Either way it would be a shame to lose those lovely stock tuning keys, Schaller M4 Light or BM Light might be a more suitable replacement if you don't want the visual downgrade of generic looking flat Y keys.