With all the contraversy over fixed jets I got quite an eye opener today. I modified a Shindaiwa 360 last fall. I put an extra port in the muffler amd increased the compression ratio by eliminating the cylinder base gasket. This saw has not missed a beat since I did this work. The mods were well worth it, The saw runs much stronger now. I put a tach on this saw today.........14,700 RPM! I couldn't believe it. The saw is totally non-adjustable, fixed hi-speed jet. Unlike some of the recent Stihl 026's the carb has remained stable.
Guess I'm just lucky.