Board Thread:New on LEGO Message Boards Wiki/@comment-33485990-20171026065626/@comment-4552817-20171026204658

You can adjust the speed through programming. In the medium motor block, click on the little dial looking icon on the left which is a power setting. Adjusting that will change the motor speed. The higher the number, the faster the motor speed. If you go negative, the direction the motor spins will reverse. Same thing for reverse though, -100 will spin faster than -20.