I purchased a cheap carburetor kit with cables from Amazon, for my Yamaha PW50. The cable was to short, and the rubber grommet was way to small, and would not snug fit into throttle hole. So I modeled up an adapter in Fusion 360, and made this adapter to solve the problem. Works like a champ. No more loose throttle or throttle play.
I printed in TPU to hopefully withstand the abuse I hope it gets. :-)
The author hasn't provided the model origin yet.