VEX iq flywheel jam

Hi everyone,
I made seesaw robot with a flywheel.
But the problem with my flywheel was that the motor was getting jamed.
So I changed the gear ratio, but the motor was only spinning up to 30 rpm,
Is there a way to solve this problem?
Also, should I make a replica of the gear box and attach it to the other end of the flywheel

If you can send pictures and videos it will help.

actually, I got the flywheel to work.
Thanks though