I looked in the plug hole and found that the cylinder has two transfer ports per side. So, from all the experimenting, this cylinder should respond to exhaust port modification. Am I correct on this assumption? Also, from what has been determined. lowering the cylinder by going to a thinner gasket should help some. I found the original gasket to be around .030" thick. I cut a new gasket that is around .015" thick. This should give a slight performance increase, correct?. I have already went to a 11.1mm carb on mine. Another thing that seems to help is a more free flowing muffler. I used the stock muffler with some of the guts removed. I put a single 1/2" id outlet which may not be enough to get the most performance. Has anyone used a Wackerengines muffler on their conversion? If so, what are your thoughts on this muffler? Did anybody modify the stock muffler? If so, what did you do and how did you do it?
If anyone is interested, a guy on Ebay has numerous parts for the Ryobi including a complete gasket kit for the engine. The price isn't too bad especially if you can make a good offer. I got a complete kit from him a while back for around $12 shipped. This is what I used as a pattern to cut a new and thinner base gasket.
What kind of adapter was used in the plug hole for the leak down test and where can it be found?
Thanks