Ralph, I respectfully disagree as I just did this on my SuperTigre 51 this past week. It lost almost 1700 rpm's going from 28 back to 20. My Zenoah G26 exhibited the same behavior when I first converted it to EI. I can't tell you why your results are different but other respected engine guys, one of which no longer frequents this forum, have said 28 is the place for the small gasers like the G26. Pe Reivers suggested that I might try 20 and work up from there as he didn't think it would need 28. I assure you it gained close to 1000 going from 20 to 24 and almost another 700 going from 24 to 28. It gained nothing advancing it beyond that, just idled worse. It is very hard to imagine it starting any easier. Yesterday I started and ran it for the guys I work with. Some of them are into RC and were interested in seeing a converted ST51 running on gasoline with spark ignition. After a few prime flips with the ignition off, I turned the ignition on, flipped it once, it fired then died. One more flip and it was running and stayed running until I shut it off. The temp outside at the time was approximately 50 deg. No electric starter needed. Again, I am not sure why you are seeing different results but that is how mine is behaving. Fly's great in the SuperSportster too. I am very impressed with this little motor other than it is just a little sensitive on the main needle. Nothing I can't live with though. Have a great one all.