[mrunderhill1975a]

My Micarb VM 28 carburetor seems to have the throttle cable binding somewhat, slowly returns to idle, sticks at higher idle than ideal, then eventually returns to low idle .  The cable does go through the nacelle which makes a sharp bend.  Other than rerouting the throttle cable, is there any other way to get a better throttle response?
Would a new carburetor spring or a more powerful spring help?  Is there a more powerful spring available?

[ace.cafe]

It is almost always cable bind, either at the nacelle, or pinched under the tank.
It also takes a sharp bend entering the top of the carb.

Typically you can work with the cable routing to get it working right, and also make sure that the cable is lubed.

[blasphemous]

I have had the same issue and like Ace says it has been the cable routing getting stuck underneath the tank, rerouting or just working the cable free from tight spots has fixed the issue.

[tooseevee]

My Micarb VM 28 carburetor seems to have the throttle cable binding somewhat, slowly returns to idle, sticks at higher idle than ideal, then eventually returns to low idle .  The cable does go through the nacelle which makes a sharp bend.  Other than rerouting the throttle cable, is there any other way to get a better throttle response?
Would a new carburetor spring or a more powerful spring help?  Is there a more powerful spring available?

           No. It's the cable as others have said. Find where it's binding and fix that. Don't try to find a stronger spring. The next thing it might do is break