You are misinformed about a couple of issues. Reed valves have been around for years and years. I have a small common brand built saw with some genuine reeds. This particular saw is at least 30 years old. Tuning an engine with reeds can be very effective, but there are many negatives also. The first question is what do you want? There is no problem building a lite weight saw motor that could have as much as 80 BHP, but why. If you want to follow this thread look up tuned exhaust which has come up several times in just the last 6 months. A two stroke motor can not produce a large amount of power without the aid of tuned exhaust. So if tuned exhaust is used then you will have an inconvenient monster. Manufactures have stayed away from tuning engines with reeds because they do not want to add to the complexity, diminish longevity, cost and sacrifice reliability for a couple extra horse power. The modern reeds are usually made out of composite materials that have a known life span. Often saw motors that have reeds were made with stainless steel pedals that have a fairly long life, but they were quite crude as compared to off road ATVs. Thanks