I don't think it will cause any problems if you wire the valve open, but part of the fun with this exhaust is the sound when you get on it!Thanks Steve for the quick reply. It was sugested to me to remove the spring that holds the valve closed and just tied the flap open with a stainless steel wire. If I do that, I was wondering if I would lose any power or have compression problems at low speeds.
Mine barely operated when it was new. I would pry it open and it would stick, or it would stick then slam shut a few seconds later. It felt like it was welded together too tightly so it was galling. (or there was slag trapped between the moving parts.)
I got some fine valve lapping compound, (600 grit Clover Compound) brushed it into the joints top and bottom, and worked it back and forth until it operated smoothly and freely. I cleaned it up and lubricated it with Nickel - Graphite Anti Seize.