Wow that's great! Ya that 2cycle is cool, definitely one of my favorite. Nice pair there too, 21355P on the one in back? One question though - instead of using string to keep the engine-kill handle compressed, how about removing it altogether?
Honda I'm totally clueless on. The wisconsin robin 2cycle I know about a little more. Parts are mainly on eBay since those engines have been out of production since the early-mid '90s. The Mikuni carbs need to be kept clean so I'm told as well as the air filter. They need to breathe. There's even a k&n filter on eBay for it that's about $30. More air flow. I still mix mine at 32:1 even though the fuel mix today is better than it was back in the '80s. Some guys running synthetic even mix it at as thin as 100:1 but I prefer to keep it rich. That's about my extent on that...other than it sounds awesome and smells great!
I only got it running one time with starting fluid. Ran good too. Left it running for a few minutes idling up and down. Then wouldn't start after that.