muffler 61 to 91
#2
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From: Flower Mound,
TX
The 91 muffler generally has more volume so you would probably lose some pressure to the fuel tank. Try it with the nose of the plane straight up for a bit to see if there is enough pressure. It could give a power increase. Adjust the carb needle as needed.
#3
Senior Member
You may lose performance as two stroke exhaust are usually tuned to the diplacement of the engine to assist the removable of the exhaust gasses. Of course, if it fits, it wouldn't hurt to try it to see how it works. I would think the flange would be a different size though.
Don
Don




