Oh yeah. I had a Tenshock Micro Hydro that had a 2040 size motor and swapped it for a 28mm and it was like a rocket, but it couldn't handle choppy water at all. It really liked glass. Had to mod the motor mount, change the esc to a 60A and change couplers. It was very fast, but I can't say it was any more fun (worrisome) that the stock motor to be real about it.