Currie GT300, more torque and more power?

Hi guys, I have an old Currie GT300, 300 watt motor, and I want to have more torque and more speed without having to buy a new motor. To my understanding, I can wrap a motor more for more torque, and unwrap a motor for more speed. What do you recommend? Also, where should I buy new magnet wire?
Thanks, iflymyhelishigh