So, you were not managing to get the speed control lever to snap across to the choke position? With the small Honda push-mower engines there are sometimes problems with people doing that: if they are not shown how to do it, they may not feel comfortable pushing that hard on a plastic lever. The problem may be worse with a larger engine.
I doubt it is necessary to change Honda's design by using a lighter torsion spring under the choke bellcrank, and I would not do so myself, but of course this is your engine. The first time you set up the speed control lever on a Honda, and get the choke at one end of the travel, and the kill switch at the other end, working precisely as you want, is a learning process. So far I have found them comfortable to use once I have set them up and then used them a couple of times - in fact I prefer them to the Briggs controls which have no detents so you are never quite sure where the choking and killing are going to happen.
Since you now have the engine working to your satisfaction, I'll close this thread.
