Some people have had good luck opening up the Juki walking foot and oiling all the friction points. Apparently a lot of problems are fixed with proper lubrication.
Originally Posted by
tlynnc
I have some straight line quilts coming up and I sure would love to pump them out full throttle!
Just remember, it's a walking foot, not a running foot! My walking foot does an awful job if I floor it; going slower gives much better results. This is probably not the problem in your case - those Juki walking feet are notoriously crummy. It's something to keep in mind, though, especially since "full throttle" on your Juki is a lot faster than on your old machine.