Number of turns Vs rpm

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I'm rewinding this motor and I just stopped to think, if I change the number of turns how will it affect rpm or "kv"? (Does kv apply to DC motors like this it is not 3 phase).

The input voltage will remain the same regardless of number of turns, will less turns result in a higher 'kV' like a 3 phase brushless motor?

Originally, this had 17 turns of 0.5mm wire and 10 poles with pairs of 17 turns.

Rewiring with 0.63mm since I want to prevent it burning out again (will also find the source of physical resistance overloading the coil and sort that too).